• Improve observability, reliability and availability by defining and measuring key metrics
• Build automation and improve systems to eliminate toil and operations work.
• Collaborate with our core infrastructure team to performance tune and optimize our cloud deployments. (Think Docker, Terraform, Kubernetes, EC2, etc.)
• Collaborate with Coinbase product teams to reduce service disruptions and automate incident response
• Proactively find and analyze reliability problems across our business units and stack, then design and implement software to create step-function improvements.
• Educate, mentor and hold accountable the engineering team to improve the reliability of our systems and make reliability a core value of the Coinbase engineering culture.

• You have at least 5+ years of software engineering experience
• Experience working with Object Oriented languages like Golang, Java, and or C#
• Strong skills around observability, debugging and performance tuning
• Strong communication skills and ability to explain technical concepts clearly and simply
• Strong interpersonal skills working with engineers from junior to principal levels
• Demonstrated critical thinking under pressure

• Experience designing and building reliable systems capable of handling high throughput and low latency
• Experience with observability and monitoring systems such as Kibana, Datadog, etc.
• Experience working in a highly regulated environment
• Exposure to both NoSQL and SQL database technologies such as DynamoDB, MongoDB, PostgreSQL, AWS Aurora.
• Familiarity with working in rapid growth environments
• Crypto-forward experience, including familiarity with onchain activity such as interacting with Ethereum addresses, using ENS, and engaging with dApps or blockchain-based services.

Job #: GPIN05US

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Wallet in Telegram is your gateway to the world of digital currencies, specially tailored for individuals in emerging markets. We understand the complexities and intimidation often associated with existing crypto solutions, which is why we've designed the Wallet to be the ultimate user-friendly platform for managing finances. No need to open a traditional bank account or wrestle with convoluted crypto exchanges and wallets.

Leveraging the power of advanced blockchain technology, Wallet delivers a seamless onboarding experience into the crypto ecosystem. It enables users to effortlessly store, send, and receive digital currencies, all via the familiar interface of Telegram. Managing your finances becomes as simple as sending a message.

At Wallet, we're committed to using technology to disrupt traditional banking systems, providing our customers with more flexible and inclusive financial services. Whether you're a crypto novice or seeking to simplify your digital finance experience, Wallet is crafted with your needs in mind.

We are looking for a Software Engineer (Crypto Anti-Fraud Platform) to join our team and help secure high-load systems against fraudulent activities. Your main responsibility will be to create scalable, fault-tolerant, and intelligent systems to detect and prevent abuse, ensuring platform integrity and user safety.

Responsibilities:

• Design and implement antifraud logic and services in a highload environment.
• Develop scalable and fault-tolerant detection systems using behavioral signals and heuristics.
• Optimize performance of real-time fraud detection pipelines.
• Collaborate with product, data, and platform teams to prevent exploitation vectors.
• Integrate with monitoring and alerting systems for early threat detection and response.
• Contribute to the design and development of safety-critical platform features.

Requirements:

• 5+ years of experience as a Software Engineer, preferably in fintech or security-focused environments.
• Strong understanding of distributed systems and anomaly detection principles.
• Proficiency in one or more programming languages (Go, Java, C++) and willingness to use Python or Kotlin for detection logic.
• Solid knowledge of databases (SQL, NoSQL), efficient querying, and handling of high-volume event data.
• Experience with logging, monitoring, and distributed tracing in security-sensitive contexts.

Nice to Have:

• Experience building or integrating anti-fraud, abuse detection, or risk scoring systems.
• Familiarity with machine learning techniques for behavioral analysis and anomaly detection.
• Experience with containerized environments and orchestration tools (Kubernetes, Docker).
• Understanding of crypto wallets, smart contracts, and blockchain-based attack vectors.

Why it is a fantastic opportunity:

• Our business is growing at an exponential scale.
• Work in a well-funded startup environment with unique growth opportunities and a chance to join a rapidly growing company with a unique product.
• Be based remotely.
• Participation in the performance review and bonus programme.
• Compensation for medical expenses.
• Provision of necessary equipment.
• Annual vacation of 20 working days plus 11 paid days off.
• 14 days of paid sick leave to support your health and recovery when needed.
• Access to internal English courses for continuous learning and improvement in language skills.

Apply Now:

About

Accountable is a digital finance platform that empowers businesses to verify and share data in a privacy preserving way, and retail investors to access verifiable yield opportunities. We aim to remove trust barriers, reduce fraud, and unlock new opportunities for efficient and safe financial growth.

We are looking for a motivated full stack engineer capable of turning ideas into code using new technologies and focusing on speed of delivery. A strong understanding of frontend and backend technologies and being self-driven are a must. Previous Web3 experience (as a developer or as a power user) is required. Understanding of blockchain fundamentals, L1/L2s, basic cryptography etc. is a plus.

Responsibilities

• Develop, test and review code
• Rapidly build and iterate on new features and MVPs using advanced technologies
• Participate in building specifications, design new features, independently assess feasibility, cost, and complexity of things to be implemented
• Handle test and production deployments
• Integrate with other protocols and sources of data

Requirements:

• Strong understanding of both frontend and backend technologies
• Proven experience building high quality web-based products
• Resourceful and self-motivated
• AI assisted coding is a big plus, but not a must as long as the focus is on speed, experimentation and feedback driven development
• Excellent general problem-solving skills and intellectual curiosity
• Up to date with latest developments in the space, a strong interest in staying on top of emerging technologies and industry trends
• Passionate about building and improving products, building MVPs and experimenting with new stuff
• Demonstrated ability to learn and adapt to new technologies quickly
• Professional integrity and dependability
• Experience with dApp development libraries and frameworks is a big plus
• Previous experience with lending protocols is a big plus
• Understanding of blockchain fundamentals, L1/L2s, bridging, basic cryptography etc. is desirable
• Experience working within a fast-paced, startup environment is a plus
• Hackathon participation and pet projects are a plus
• Exposure to growth hacking principles and A/B testing methodologies
• Excellent written and verbal communication skills in English
• Leadership skills are a big plus
• Languages used: Javascript, Python, Java, Solidity
• Frameworks: React

Setup:

• Fully remote (currently) with preference for European timezone B2B collaboration

StarkWare is at the forefront of blockchain and deep technology, creating cutting-edge solutions that scale Ethereum and Bitcoin, and unlock the potential of Web3. Our technology combines academic rigor with practical application, enabling the next generation of decentralized innovation. Join a team of the brightest minds pushing the boundaries of cryptographic proof systems and scalable blockchain infrastructure.

*This role requires travel at least twice a year for team off-sites and industry conferences.

Mission: You will play a key role in developing our iOS/Android apps, ensuring a seamless and enjoyable user experience. As part of a dynamic and collaborative team, you’ll contribute to cutting-edge projects that push the boundaries of web3 mobile technology.

Key Responsibilities:

• Develop and maintain iOS/Android applications integrated with the Starknet network, optimizing performance and responsiveness.
• Lead features from research and design to implementation and launch.
• Collaborate with distributed teams across Engineering, Product, and Ecosystem to set clear roadmaps and milestones.
• Engage with the Starknet community to develop and integrate innovative solutions.
• Write clean, maintainable, and well-tested code.
• Stay up to date with industry trends and apply best practices to improve development processes.

• For iOS: Proficiency in Swift, UIKit, and a solid understanding of iOS development best practices. TypeScript and React Native knowledge is a plus
• For Android: Proficiency in Kotlin in native Android development (Kotlin/Java). TypeScript and React Native knowledge is a plus
• A passion for developing phenomenal user experiences. 
• Ability to quickly adapt to new programming languages, tools, and environments.
• Strong ability to write efficient, testable, and maintainable code.
• Fast learner with a proactive, “get things done” mindset.

Nice to Have:

• Experience with blockchain protocols, particularly Ethereum and Starknet.
• Experience with open-source development.
• Experience with SDK Development

Apply Now:

The mission of the Platform Product Group engineers is to build a trusted, scalable and compliant platform to operate with speed, efficiency and quality. Our teams build and maintain the platforms critical to the existence of Coinbase. There are many teams that make up this group which include Product Foundations (i.e. Identity, Payment, Risk, Proofing & Regulatory, Finhub), Machine Learning, Customer Experience, and Infrastructure.

The Data Platform team builds and operates systems to centralize all of Coinbase's internal and third-party data, making it easy for teams across the company to access, process, and transform that data for analytics, machine learning, and powering end-user experiences. As an engineer on the team you will contribute to the full spectrum of our systems, from managing foundational processing and data storage, to building and maintaining scalable pipelines, to developing frameworks, tools, and internal applications to make that data easily and efficiently available to other teams and systems.

What you’ll be doing (ie. job duties):

• Design, build, and operate our foundational data-heavy services: storage (cloud data warehouse, data lake), orchestration (Airflow), batch processing (Spark, SQL), streaming services (Kafka), query federation and caching, time-series db, graph db, and real-time event aggregation stores.
• Build and maintain data integration & process SDKs for use by internal services and product teams throughout Coinbase.
• Design and build self-service applications to empower our users to manage and troubleshoot their own data pipelines running on our platforms.
• Design and build services for end-to-end data security and data observability: managing access controls across multiple storage and access layers, tracking data quality, cataloging datasets and their lineage, usage auditing.
• Convert functional requests from data analysts, ML, and security & compliance into reusable and scalable patterns; and assemble data microservices into data platforms for critical business verticals and user cohorts.

What we look for in you (ie. job requirements):

• You have at least 5+ years of experience in software engineering.
• You have Strong Python, Go, or Java backend development skills.
• You have general experience working with data systems or data pipelines.
• You are familiar with design patterns such as scale-out, caching, key/value, and columnar.
• You leverage SQL, Python, Airflow, and BI expertise to analyze data for operational insights.

Nice to Have:

• Crypto-forward experience, including familiarity with onchain activity such as interacting with Ethereum addresses, using ENS, and engaging with dApps or blockchain-based services

Job #: P62464

*Answers to crypto-related questions may be used to evaluate your onchain experience

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About Paxos  Today’s financial infrastructure is archaic, expensive, inefficient and risky — supporting a system that leaves out more people than it lets in. So we’re rebuilding it. We’re on a mission to open the world’s financial system to everyone by enabling the instant movement of any asset, any time, in a trustworthy way. For over a decade, we’ve built blockchain infrastructure that tokenizes, custodies, trades and settles assets for the world’s leading financial institutions, like PayPal, Venmo, Mastercard and Interactive Brokers.  About the team The Brokerage team at Paxos enables partners to offer seamless crypto trading and custody through a fully regulated, scalable platform. We power some of the largest fintechs and enterprises, allowing them to integrate crypto services without the complexity of building and managing their own infrastructure. About the role  As a Staff Software Engineer on the Brokerage Engineering team at Paxos, you will play a pivotal role in designing, building, and maintaining high-performance, scalable, and secure crypto brokerage solutions. You will work on mission-critical systems that power billions of dollars in trading volume, ensuring top-tier broker-dealers have access to the most reliable and efficient trading infrastructure. In this role, you will bring deep technical expertise to architect and optimize complex distributed systems, make key technical decisions, and solve challenging engineering problems. You will collaborate closely with cross-functional teams, including Product, Growth, and other Engineering teams, to deliver innovative solutions that drive Paxos' market leadership in crypto brokerage. If you thrive in a fast-paced, high-impact environment and are passionate about building world-class financial infrastructure, we’d love to hear from you. What you’ll do 

Own the full software development lifecycle: Design, develop, test, and deploy high-performance, scalable brokerage solutions, ensuring reliability and efficiency for mission-critical financial systems. Tackle complex technical challenges: Break down ambiguous and intricate requirements into actionable technical tasks, making data-driven decisions to optimize performance, security, and scalability. Balance trade-offs effectively: Navigate key engineering trade-offs, ensuring the right balance between MVP vs. enterprise-grade, time-to-market vs. long-term scalability, and other critical factors. Collaborate across teams: Work closely with Product, Growth, and other Engineering teams to align technical solutions with business objectives and customer needs. Contribute to the future of brokerage at Paxos: Play a key role in shaping the next generation of crypto brokerage solutions, ensuring they meet the highest industry standards for performance, security, and availability.

About you

7+ years of software development experience, with proficiency in at least one of the following languages: Golang (preferred), Kotlin, Java, Python. Strong computer science fundamentals, including data structures, algorithms, and distributed system design. Familiarity with cloud-native infrastructure and tools, such as Kubernetes, Docker, Kafka, and AWS services. Ability to write high-quality, maintainable, and well-documented code. Strong problem-solving skills and a keen ability to troubleshoot complex technical issues. Effective collaboration and communication skills, with the ability to work closely with cross-functional teams. Experience building Compliance solutions (KYC, KYB, KYT) or onboarding or identity platforms is a huge plus.  A passion for learning and applying new technologies to solve real-world problems.

Important Notice for Paxos Applicants We’ve become aware of fraudulent accounts posting as Paxos recruiters on LinkedIn and other platforms. These scammers attempt to deceive applicants into paying for job opportunities or providing personal financial information.  To verify a legitimate Paxos recruiter: 

We only use @paxos.com email addresses We never ask for payment or financial details to apply, interview, or work here For technical roles, we do not perform a coding interview without prior screening by our engineering team 

Thanks for your interest in Paxos!  Pay and benefits

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We’re Hiring: Android & iOS Developer | Web3 Experience Required

🔹 Industry: Mobile Development | Blockchain | Web3 Solutions

Evola Labs is on the lookout for a talented Android & iOS Developer with a solid background in Web3 technologies. As part of our innovative team, you will contribute to the development of mobile applications that leverage blockchain technology.

What You'll Do:

✅ Design and create advanced applications for Android and iOS platforms.

What We’re Looking For:

🔹 3+ years of experience in Android and iOS development.

• Remote work flexibility
• Competitive compensation package
• Growth opportunities in a fast-evolving Web3 space
• Collaborative and innovative work environment
• Learning and development support

Apply Now:

The Institutional team enables the foundations of Coinbase's institutional business supporting thousands of large financial institutions. We enable institutions to custody their digital assets and participate in the crypto economy in a secure and safe way. We take pride in building a scalable & secure crypto platform supporting hundreds of assets and enabling crypto participation with staking, governance and web3 gateways. The team has interesting work on building cutting-edge crypto technologies, scalable infrastructure and UI surfaces across web, mobile and browser extensions in a fast-paced industry with an opportunity to build several new initiatives.

The Markets team within the Institutional Product Group is dedicated to creating top-tier Exchange platforms, offering unparalleled low latency and high performance in the crypto trading space. As a Staff Software Engineer on the Markets team, you’ll be instrumental in developing and sustaining the core technology that drives our platforms. Collaborating with a talented group of engineers and product managers, you’ll deliver institutional-grade systems that empower high-value customers to trade with unmatched speed and efficiency. This role presents the opportunity to tackle complex, unique challenges, bridging the demands of large-scale applications with the precision required for low-latency trading systems. You'll be at the forefront of designing, building, and executing solutions for some of the most impactful and challenging problems in the industry.

What you’ll be doing (ie. job duties):

• Architect and implement core trading platform components responsible for connectivity, market data, trade execution, clearing and settlement using Java, Golang and similar technologies
• Design scalable, low latency, garbage free systems to solve novel problems with modern cloud technology and industry best practices.
• Articulate a long term vision for maintaining and scaling our core trading systems and the teams running them.
• Work with engineers, product managers, designers, and senior leadership to turn our product and technical vision into a tangible roadmap every quarter.
• Write high quality, well tested code to meet the needs of your customers.
• Mentor team members and help uplift the technical bar across the team

What we look for in you:

• 8+ years of experience in backend software engineering using Java, Golang or similar languages
• You’ve designed, built, scaled and maintained high volume and low latency production services
• You’ve experience in architecting and developing solutions to ambiguous problems with significant impact
• Passion for building an open financial system that brings the world together

Nice to haves:

• You have built order management, risk or matching engines that have high volume and low latency characteristics
• Demonstrated experience working with complex distributed systems at scale
• You are familiar with developing event driven architectures, GC free coding approaches, performance tuning of OS and networking stacks
• Knowledge of AWS infrastructure and tools, as well as containerization technologies like Docker and orchestration platforms like Kubernetes
• You have gone through a rapid growth in your company (from startup to mid-size).
• You have experience with Blockchain technology (such as Bitcoin, Ethereum etc..)
• You have experience decomposing a large monolith into microservices.
• You’ve worked with Java, Golang, Docker, Postgres, Container Orchestration systems and AWS based technologies.
• Crypto-forward experience, including familiarity with onchain activity such as interacting with Ethereum addresses, using ENS, and engaging with dApps or blockchain-based services.

Job #: GIBE06US

*Answers to crypto-related questions may be used to evaluate your onchain experience

#LI-Remote

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Blockchain.com is the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time. We are looking for software engineers from a variety of technical backgrounds with a proven track record in building scalable, reliable and performant systems. You will play a critical role in building financial and crypto-native products, services and APIs. As a Senior Back-End Engineer you should lead by example - driving the technical discussions, influencing the approach and making a positive impact on the team's development by advocating the best engineering practices. WHAT YOU WILL DO

You will be part of the Brokerage - Payments team who enable blockchain customers to deposit and withdraw in the blockchain app Develop and integrate APIs from new and existing payment providers, banks and other third parties across multiple countries. Work with our FinOps team and payment providers to resolve customer issues Advocate best practices, code quality, test coverage and drive technical discussions Optimise existing systems for scalability, extensibility and performance whilst building out reusable, modular code for use across Blockchain’s products Ensure security is at the forefront of everything you do, employing advanced encryption schemes to secure user and company data Work within interdisciplinary teams to continually deliver the highest quality software to our users

WHAT YOU WILL NEED

You know at least one programming language in depth You have at least 7 years experience building and shipping highly-available, fault tolerant, production ready distributed backend systems You have experience in any JVM based languages (such as Java, Kotlin, Scala) and are confident in your ability to build, debug and ship microservices You are customer focused and continuously suggest how the backend can provide the best Customer Experience You pride yourself on consistent high levels of test coverage, strong technical documentation and effective monitoring Preferably exposure to technologies such as Kafka, PostgreSQL, Redis We use Kotlin, PostgreSQL, Kafka, Redis, Datadog, Amplitude, Grafana, BigQuery, ApacheSpark and more A passion for crypto and the transformations it enables

COMPENSATION & PERKS

Full-time salary based on experience and meaningful equity in an industry-leading company Hybrid model working from home & awesome office location in Buenos Aires Apple equipment The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field Flexible work culture

Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business need at the time. You may contact our Data Protection Officer by email at email. Your personal data will be processed for the purposes of managing Controller’s recruitment related activities, which include setting up and conducting interviews and tests for applicants, evaluating and assessing the results thereto, and as is otherwise needed in the recruitment and hiring processes. Such processing is legally permissible under Art. 6(1)(f) of Regulation (EU) 2016/679 (General Data Protection Regulation) as necessary for the purposes of the legitimate interests pursued by the Controller, which are the solicitation, evaluation, and selection of applicants for employment. Your personal data will be shared with Greenhouse Software, Inc., a cloud services provider located in the United States of America and engaged by Controller to help manage its recruitment and hiring process on Controller’s behalf.  Accordingly, if you are located outside of the United States, your personal data will be transferred to the United States once you submit it through this site. Because the European Union Commission has determined that United States data privacy laws do not ensure an adequate level of protection for personal data collected from EU data subjects, the transfer will be subject to appropriate additional safeguards under the standard contractual clauses.

Apply Now:

Blockchain.com is the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time. We are looking for software engineers from a variety of technical backgrounds with a proven track record in building scalable, reliable and performant systems. You will play a critical role in building financial and crypto-native products, services and APIs. As a Senior Full-Stack Developer you should lead by example - driving the technical discussions, influencing the approach and making a positive impact on the team's development by advocating the best engineering practices. WHAT YOU WILL DO:

Design, develop, and maintain scalable backend services and APIs. Build dynamic, user-friendly frontends using modern frameworks like React. Work closely with design and product teams to ensure seamless integration of user-facing and server-side features. Collaborate on system architecture and design decisions, emphasizing security, performance, and scalability. Implement automated testing across the stack to ensure high-quality deliverables. Optimize applications for performance and scalability in both backend and frontend layers. Write clean, reusable, and efficient code while adhering to best practices.

WHAT YOU WILL NEED:

Strong backend expertise in Kotlin or Java Solid understanding of databases (PostgreSQL, MySQL) Understanding of system design principles and scalable architectures Proficiency in frontend technologies like React Experience with event-driven architectures (e.g., Kafka, RabbitMQ). Strong problem-solving skills and ability to debug complex systems.

NICE TO HAVE:

Experience with cloud platforms like GCP, AWS or Azure Knowledge of blockchain technologies or financial systems. Skills in performance optimization on both client and server sides. Familiarity with Docker and CI/CD tools.

COMPENSATION & PERKS

Competitive full-time salary based on experience and meaningful equity in an industry-leading company The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an exciting, emerging industry. Performance-based bonuses Apple equipment provided by the company Hybrid role from our office in Palermo, Buenos Aires.

Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time. You may contact our Data Protection Officer by email at email. Your personal data will be processed for the purposes of managing Controller’s recruitment related activities, which include setting up and conducting interviews and tests for applicants, evaluating and assessing the results thereto, and as is otherwise needed in the recruitment and hiring processes. Such processing is legally permissible under Art. 6(1)(f) of Regulation (EU) 2016/679 (General Data Protection Regulation) as necessary for the purposes of the legitimate interests pursued by the Controller, which are the solicitation, evaluation, and selection of applicants for employment. Your personal data will be shared with Greenhouse Software, Inc., a cloud services provider located in the United States of America and engaged by Controller to help manage its recruitment and hiring process on Controller’s behalf.  Accordingly, if you are located outside of the United States, your personal data will be transferred to the United States once you submit it through this site. Because the European Union Commission has determined that United States data privacy laws do not ensure an adequate level of protection for personal data collected from EU data subjects, the transfer will be subject to appropriate additional safeguards under the standard contractual clauses.  Your personal data will be retained by Controller as long as Controller determines it is necessary to evaluate your application for employment.  Under the GDPR, you have the right to request access to your personal data, to request that your personal data be rectified or erased, and to request that processing of your personal data be restricted. You also have the right to data portability. In addition, you may lodge a complaint with an EU supervisory authority.  

Apply Now:

Blockchain.com is the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time We are looking for Software Engineers from a variety of technical backgrounds with a proven track record in building scalable, reliable and performant systems. You will play a critical role in building financial and crypto-native products, services and APIs. As a Senior Back-End Engineer you should lead by example - driving the technical discussions, influencing the approach and making a positive impact on the team's development by advocating the best engineering practices. WHAT YOU WILL DO:

Design, develop, and maintain scalable backend services using Kotlin & Java Build and optimize APIs for seamless integration with front-end and third-party systems. Work with relational and NoSQL databases to manage and process large-scale data efficiently. Implement and maintain CI/CD pipelines for smooth deployment and testing processes. Collaborate with cross-functional teams to deliver secure, high-quality, and user-centric solutions. Conduct code reviews and mentor junior developers to foster a culture of continuous improvement. Work closely with design and product teams to ensure seamless integration of user-facing and server-side features.

WHAT YOU WILL NEED:

Proficiency in Java or Kotlin Strong knowledge of microservices architecture, API design, and database systems (PostgreSQL, MySQL) Understanding of system design principles and scalable architectures Familiarity with Docker and CI/CD tools. Experience with event-driven architectures (e.g., Kafka, RabbitMQ). Strong problem-solving skills, attention to detail, and a commitment to code quality.

NICE TO HAVE:

Experience with cloud platforms like GCP, AWS or Azure Knowledge of blockchain technologies or financial systems. Proficiency in frontend technologies like React

COMPENSATION & PERKS

Competitive full-time salary based on experience and meaningful equity in an industry-leading company Awesome office location in the heart of Paris - working 3 days in the office is mandatory Work from Anywhere policy The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an exciting, emerging industry Unlimited vacation policy; work hard and take time when you need it Performance-based bonuses paid in cash Apple equipment provided by the company

Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time. You may contact our Data Protection Officer by email at email. Your personal data will be processed for the purposes of managing Controller’s recruitment related activities, which include setting up and conducting interviews and tests for applicants, evaluating and assessing the results thereto, and as is otherwise needed in the recruitment and hiring processes. Such processing is legally permissible under Art. 6(1)(f) of Regulation (EU) 2016/679 (General Data Protection Regulation) as necessary for the purposes of the legitimate interests pursued by the Controller, which are the solicitation, evaluation, and selection of applicants for employment. Your personal data will be shared with Greenhouse Software, Inc., a cloud services provider located in the United States of America and engaged by Controller to help manage its recruitment and hiring process on Controller’s behalf.  Accordingly, if you are located outside of the United States, your personal data will be transferred to the United States once you submit it through this site. Because the European Union Commission has determined that United States data privacy laws do not ensure an adequate level of protection for personal data collected from EU data subjects, the transfer will be subject to appropriate additional safeguards under the standard contractual clauses.  Your personal data will be retained by Controller as long as Controller determines it is necessary to evaluate your application for employment.  Under the GDPR, you have the right to request access to your personal data, to request that your personal data be rectified or erased, and to request that processing of your personal data be restricted. You also have the right to data portability. In addition, you may lodge a complaint with an EU supervisory authority.

Apply Now:

Blockchain.com is the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time. We are looking for software engineers from a variety of technical backgrounds with a proven track record in building scalable, reliable and performant systems. You will play a critical role in building financial and crypto-native products, services and APIs. As a Senior Back-End Engineer you should lead by example - driving the technical discussions, influencing the approach and making a positive impact on the team's development by advocating the best engineering practices. WHAT YOU WILL DO

You will be part of the Brokerage - Orders team who enable buy, sell and swap of crypto Develop and integrate APIs from new and existing services, to our various product applications. Become a key member of a dedicated engineering team committed to rapidly shipping, and iterating on products that directly impact millions of users Advocate best practices, code quality, test coverage and drive technical discussions Optimise existing systems for scalability, extensibility and performance whilst building out reusable, modular code for use across Blockchain’s products Ensure security is at the forefront of everything you do, employing advanced encryption schemes to secure user and company data Work within interdisciplinary teams to continually deliver the highest quality software to our users

WHAT YOU WILL NEED

You know at least one programming language in depth You have at least 7 years experience building and shipping highly-available, fault tolerant, production ready distributed backend systems You have experience in any JVM based languages (such as Java, Kotlin, Scala) and are confident in your ability to build, debug and ship microservices You are customer focused and continuously suggest how the backend can provide the best Customer Experience You pride yourself on consistent high levels of test coverage, strong technical documentation and effective monitoring Preferably exposure to technologies such as Kafka, PostgreSQL, Redis We use Kotlin, PostgreSQL, Kafka, Redis, Datadog, Amplitude, Grafana, BigQuery, ApacheSpark and more Have a basic understanding of reactive systems using CQRS and event sourcing. A bonus would be experience using Akka. A passion for crypto and the transformations it enables

COMPENSATION & PERKS

Full-time salary based on experience and meaningful equity in an industry-leading company Hybrid model working from home & awesome office location in the heart of London Unlimited vacation policy; work hard and take time when you need it Apple equipment The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field Flexible work culture

Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time. You may contact our Data Protection Officer by email at email. Your personal data will be processed for the purposes of managing Controller’s recruitment related activities, which include setting up and conducting interviews and tests for applicants, evaluating and assessing the results thereto, and as is otherwise needed in the recruitment and hiring processes. Such processing is legally permissible under Art. 6(1)(f) of Regulation (EU) 2016/679 (General Data Protection Regulation) as necessary for the purposes of the legitimate interests pursued by the Controller, which are the solicitation, evaluation, and selection of applicants for employment. Your personal data will be shared with Greenhouse Software, Inc., a cloud services provider located in the United States of America and engaged by Controller to help manage its recruitment and hiring process on Controller’s behalf.  Accordingly, if you are located outside of the United States, your personal data will be transferred to the United States once you submit it through this site. Because the European Union Commission has determined that United States data privacy laws do not ensure an adequate level of protection for personal data collected from EU data subjects, the transfer will be subject to appropriate additional safeguards under the standard contractual clauses.  Your personal data will be retained by Controller as long as Controller determines it is necessary to evaluate your application for employment.  Under the GDPR, you have the right to request access to your personal data, to request that your personal data be rectified or erased, and to request that processing of your personal data be restricted. You also have the right to data portability. In addition, you may lodge a complaint with an EU supervisory authority.

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Blockchain.com is the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time. We are looking for an experienced Software Engineer to join our Exchange team in our London office. Blockchain.com is a high-performance culture marked by fearlessness and hyper productivity. You are a hardworking team player with a desire to learn and grow with us, someone who can work harder, faster, and smarter to deliver tangible results and process improvements. WHAT YOU WILL DO

Build low latency, scalable and highly performant exchange services including matching engine, customer gateways, market data, connectivity to external trading systems, etc. Deliver high quality systems that integrate testing at every development stage. Be a part of a dedicated engineering team committed to rapidly shipping, and iterating on products that directly impact millions of users. Be at the forefront of the cryptocurrency exchange ecosystem building out a new set of financial services, systems and architecture. Gain exposure to an array of low latency, high throughput techniques and algorithms. Ensure security is at the forefront of everything you do, employing advanced encryption schemes to secure user and company data. Work closely with the other tech teams to seamlessly deliver the highest quality products and improve the customer experience.

WHAT YOU WILL NEED

The foremost quality for this position or any position at Blockchain.com is integrity. You possess an innate curiosity, and thrive on learning new technologies. Extensive experience in C/C++ development, including metaprogramming. Experience with Java, Python and SQL would be useful. Experience in several of the following programming areas:

Multithreading Network programming, including multicast Interprocess Communication (shared memory, Unix/Linux queues) Performance benchmarking and tuning

Extreme interest in delivering high quality software. This means that testing is embedded in the development process from the very beginning, from coding stage (unit testing), to integration testing (local and end to end integration testing), to performance (load and capacity) testing and finally, to failure recovery testing. Software engineers are fully involved in the testing process, driving much of the testing at all stages. Experience in trading system architecture, exchange gateway connectivity (binary and FIX), market data generation and ingestion, high throughput, low latency systems. You take a pragmatic approach to developing clean solutions to complex problems. Understanding of algorithms, data structures, databases and large-scale systems.

COMPENSATION & PERKS

Unlimited vacation policy; work hard and take time when you need it Apple equipment Full-time salary based on experience and meaningful equity in an industry-leading company The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field Flexible work culture  

Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time. You may contact our Data Protection Officer by email at email. Your personal data will be processed for the purposes of managing Controller’s recruitment related activities, which include setting up and conducting interviews and tests for applicants, evaluating and assessing the results thereto, and as is otherwise needed in the recruitment and hiring processes. Such processing is legally permissible under Art. 6(1)(f) of Regulation (EU) 2016/679 (General Data Protection Regulation) as necessary for the purposes of the legitimate interests pursued by the Controller, which are the solicitation, evaluation, and selection of applicants for employment. Your personal data will be shared with Greenhouse Software, Inc., a cloud services provider located in the United States of America and engaged by Controller to help manage its recruitment and hiring process on Controller’s behalf.  Accordingly, if you are located outside of the United States, your personal data will be transferred to the United States once you submit it through this site. Because the European Union Commission has determined that United States data privacy laws do not ensure an adequate level of protection for personal data collected from EU data subjects, the transfer will be subject to appropriate additional safeguards under the standard contractual clauses.  Your personal data will be retained by Controller as long as Controller determines it is necessary to evaluate your application for employment.  Under the GDPR, you have the right to request access to your personal data, to request that your personal data be rectified or erased, and to request that processing of your personal data be restricted. You also have the right to data portability. In addition, you may lodge a complaint with an EU supervisory authority.

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About Us: Founded more than 15 years ago and headquartered in Chicago, the DV Group of financial services firms has grown to more than 350 people operating throughout North America and in Europe. Since spinning out of a large brokerage firm in 2016, DV Trading has rapidly scaled as an independent proprietary trading firm utilizing its own capital, trading strategies, and risk management methodologies to provide liquidity to worldwide financial markets and hedging opportunities to commodity producers and users. Now, DV group affiliates include two broker dealers, a cryptocurrency market making firm, and a bourgeoning investment adviser.DV Energy is a rapidly growing division that specializes in trading crude oil, refined products, natural gas, and related energy markets across US, Europe, and Asia. Our proprietary risk management and trading methodologies along with a strong ability to adapt to changing conditions has allowed DV Energy to grow into one of the largest financial participants within the global energy complex.   Overview: DV Trading, LLC is a proprietary trading firm with over 200 employees trading equites, fixed income, FX and commodity products. DV Energy is a rapidly growing division that specializes in trading crude oil, refined products, natural gas, and other commodities across US, European, and Asian markets. Our combined risk management, world class technology, and human capital have enabled us to become one of the largest liquidity providers within the global energy complex. We are looking for an experienced software developer to work with a small team responsible for development and daily operations of an event-based risk management, market data and pricing platform using modern and performant technologies. This effort is part of a greenfield project and the suitable candidate will be involved in the development of the overall trading system.   Responsibilities:

Work alongside other software engineers, traders, and quants to develop and expand our risk management and trading platform Create scalable services for financial derivatives pricing and market data Efficient storage and access scheme for data and reference data across all frequencies, including microstructure data Building high-performance components for simulation and live trading

  Requirements:

Bachelor’s degree or higher in CS, Engineering or other technical discipline 2+ years professional experience developing infrastructure for quantitative trading Demonstrated ability to program in a scientific computing environment, preferably in Python/NumPy/Pandas and Java/C++ Experience working with distributed systems and large data sets Strong knowledge of algorithms, design patterns, OOP, threading, multiprocessing, etc. Experience with SQL, NoSQL, or tick databases Experience working in a Unix environment and git Familiarity with Kafka, Docker, AirFlow, Luigi Strong communication skills in verbal and written English. Domain knowledge in futures & swaps is a plus

  Benefits 

Highly competitive compensation and bonus structure Meritocratic environment with ample opportunity for growth Blue Cross Blue Shield Medical PPO Health Savings Account, MetLife Dental, MetLife Vision Coverage Flex Spending Account Employer paid life insurance Optional Long-term Disability, and AD&D Insurance Pre-Tax Parking and Transit Casual work environment

DV is not accepting unsolicited resumes from search firms. Only search firms with valid, written agreements with DV should submit resumes in response to DV’s posted positions. All resumes submitted by search firms to DV via e-mail, the Internet, personal delivery, facsimile, or any other method without a valid written agreement shall be deemed the sole property of DV, and no fee will be paid in the event the candidate is hired by DV. DV is proud to be an equal opportunity employer and committed to creating an inclusive environment for all employees.

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About Us:Founded more than 15 years ago and headquartered in Chicago, the DV Group of financial services firms has grown to more than 450 people operating throughout North America and in Europe. Since spinning out of a large brokerage firm in 2016, DV Trading has rapidly scaled as an independent proprietary trading firm utilizing its own capital, trading strategies, and risk management methodologies to provide liquidity to worldwide financial markets and hedging opportunities to commodity producers and users. Now, DV group affiliates include two broker dealers, a cryptocurrency market making firm, and a bourgeoning investment adviser.DV Energy is a rapidly growing division that specializes in trading crude oil, refined products, natural gas, and related energy markets across US, Europe, and Asia. Our proprietary risk management and trading methodologies along with a strong ability to adapt to changing conditions has allowed DV Energy to grow into one of the largest financial participants within the global energy complex.Responsibilities:

Build and improve a variety of proprietary trading tools to support the trading desks across the business Collaborate with other developers, tech leaders, traders, and researchers to outline the technical needs for each trading application Work with technology and business stakeholders in iterative fashion to deliver platform functionality Develop greenfield innovative solutions to address business needs

Requirements:

Expected to graduate with a degree in Computer Science, Computer Engineering, or related field by 2024-2025 Experience programming in either C++, Python, or Java in Linux environments Excellent listening, interpersonal, written, and oral communication skills is required. Excellent analytical and creative problem-solving skills required.

  Annual compensation range $80K - $120K + discretionary bonus eligibility DV is not accepting unsolicited resumes from search firms. Only search firms with valid, written agreements with DV should submit resumes in response to DV’s posted positions. All resumes submitted by search firms to DV via e-mail, the Internet, personal delivery, facsimile, or any other method without a valid written agreement shall be deemed the sole property of DV, and no fee will be paid in the event the candidate is hired by DV. DV is proud to be an equal opportunity employer and committed to creating an inclusive environment for all employees.  

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Interested in working on cutting-edge blockchain technology and creating equitable access to the global financial system? Since 2014, the mission-driven team at the Stellar Development Foundation (SDF) has helped fuel the tremendous growth of the Stellar blockchain network, an open-source platform that operates at high-scale today. Developers and companies around the world build on it, and the SDF team is expanding to support the rapidly growing and changing Stellar ecosystem. As a part of the Wallet team, you will work on products that power the ecosystem of applications that connect end-users to the Stellar network. Our team builds one of these applications, Freighter, as well as the open-source libraries and services that they depend on. Your work will be at the intersection of scale and usability: designing opinionated backend systems and interfaces that accelerate downstream application development and deploying and scaling those systems as Stellar’s transaction throughput and userbase grows. In this role, you will:

Work on cutting-edge technology at the intersection of blockchain and finance. Drive all aspects of the development process for wallet projects, from vision to implementation. Design new functionality and developer-facing APIs that enhance the ecosystem. Build and maintain scalable web services that align with the foundation’s mission. Identify developer needs and design standardized protocols to improve developer velocity across the ecosystem. Engage with the open-source community on diverse projects, frameworks, and ideas. Collaborate on code reviews, design discussions, and best practices for engineering at SDF. Investigate and resolve performance bottlenecks to ensure our API services scale effectively. Author detailed technical specifications (RFCs) to contribute to our robust design process.

You have:

5+ years of experience developing software as part of a collaborative team. Strong computer science fundamentals, including data structures, algorithms, distributed systems, and information retrieval. Proficiency in writing server applications in languages such as Go, Python, Rust, C#, Java, or C++, and a willingness to work across languages when needed. A solid grasp of software design patterns and the ability to build reusable, extensible, and modular components. Experience supporting production web services at scale. Excellent communication skills, with the ability to advocate for and lead technical discussions, especially during design and code reviews. A strong product mindset that drives a passion for understanding and designing for current and anticipated user needs.

Bonus Points if (optional):

You have experience with blockchain technology. You have experience building data pipelines. You have experience contributing to open-source projects. You have experience specifically with Go and NodeJS

We offer competitive pay with a base salary range for this position of $170,000 - $260,000 depending on job-related knowledge, skills, experience, and location. In addition, we offer lumen-denominated grants along with the following perks and benefits: USA Benefits/Perks:

Competitive health, dental & vision coverage with most plans covered at 100% for the employee + any dependents Flexible time off + 15 company holidays including a company-wide holiday break Up to 12 weeks of paid parental leave for both non-birthing and birthing parents, as well as up to 14 weeks of paid pregnancy leave for birthing parents Gym reimbursement ($80 per month) Life & ADD (up to $50K) Short & Long term disability 401K with 4% match Health & Dependent Care FSA Accounts Commuter benefits with $250/month employer contribution Health Savings Account (HSA) with monthly employer contribution Family building benefits through Kindbody Wellbeing benefits (One Medical, Rightway, Headspace) L&D budget of $1,500/year Daily lunch and snacks in office Company retreats

About Stellar   Stellar is more than a blockchain. Powered by a decentralized, fast, scalable, and uniquely sustainable network made for financial products and services and a thriving and passionate ecosystem that includes a non-profit organization driven by a mission, Stellar is paving the path to unlock the world’s economic potential through blockchain technology. Built with speed and low costs in mind, the Stellar network provides builders and financial institutions worldwide a platform to issue assets, and to send and convert currencies in real time creating real world utility. Founded in 2014, the Stellar Development Foundation (SDF) supports the continued development and growth of the Stellar network and also serves the ecosystem of NGOs, corporations, universities, small businesses, governments, and solo entrepreneurs building on the Stellar network through tooling, funding and strategic collaborations. Together, Stellar is where blockchain meets the real world.   About the Stellar Development Foundation   The Stellar Development Foundation (SDF) is a non-profit organization focused on working with and supporting changemakers to create equitable access to the global financial system through blockchain technology. SDF provides grants, investments, funding, and other awards to builders and organizations. SDF also develops resources and tooling on the Stellar network to help unlock real world utility. As a nonprofit foundation, SDF puts the health of the Stellar network and the Stellar ecosystem and its mission above all else.   We look forward to hearing from you!   Privacy Policy   By submitting your application, you are agreeing to our use and processing of your data in accordance with our Privacy Policy.   SDF is committed to diversity in its workforce and is proud to be an equal opportunity employer. SDF does not make hiring or employment decisions on the basis of race, color, religion, creed, gender, national origin, age, disability, veteran status, marital status, pregnancy, sex, gender expression or identity, sexual orientation, citizenship, or any other basis protected by applicable local, state or federal law.

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GK8 is seeking a Senior Mobile Developer to join our front-end team. In this role, you will work closely with product managers and UI/UX designers to develop the next generation of GK8’s mobile applications for both iOS and Android. You will leverage the latest mobile frameworks and technologies to ensure high performance, scalability, and a seamless user experience. This position requires strong technical expertise, problem-solving skills, and a passion for delivering top-tier mobile applications.

Responsibilities

• Develop and enhance GK8’s mobile applications for iOS and Android.
• Ensure the best performance and user experience of our applications.
• Stay up to date with the latest mobile frameworks and technologies.
• Implement best practices in mobile development, including security and performance optimization.
• Work in an agile environment to meet project goals and timelines.

• 5+ years of experience in native mobile application development for iOS and Android platforms.
• Proficiency in programming languages such as Swift, Kotlin, and Java.
• Strong understanding of mobile development best practices, design patterns, and architectures.
• A passion for developing a pixel-perfect user experience.
• Excellent problem-solving, analytical, and communication skills.

• Experience with SwiftUI and/or Jetpack Compose.
• Experience developing using KMM (Kotlin Multiplatform Mobile).
• Familiarity with cryptocurrencies and blockchain technology.

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