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Who we are  We simplify wealth creation. Founded in 2014 in Vienna, Austria by Eric Demuth, Paul Klanschek and Christian Trummer, we’re here to help people trust themselves enough to build their financial freedom — for now and the future. Our user-friendly, trade-everything platform empowers both first-time investors and seasoned experts to invest in the cryptocurrencies, crypto indices, stocks, precious metals and commodities they want — with any sized budget, 24/7. Our global team works across different cultures and time zones, bringing our products to more than 6 million customers, making us one of Europe’s safest and most secure platforms that powers modern investing. Headquartered in Austria but operating across Europe, our products are built by fast-moving, talented, “roll-up-your-sleeves-and-make-it-happen” kind of people. It’s these diverse perspectives and innovative minds operating as ONE TEAM that keep Bitpanda at the cutting edge of our industry. So if you’re someone who thinks big, moves fast and wants to make an impact right from day one, then get ready to join our industry-changing team. Let’s go!Your mission  As an Android Developer at Bitpanda, you will work on the development of our native Android app as part of a cross functional team. Next to hands-on feature development you are responsible for non-functional requirements like performance, quality and scalability of the application. What you'll do

Ensure that the app meets our quality standards by creating unit tests and doing code reviews Design and maintain the architecture of new features and existing ones Collaborate with cross-functional teams, designers and technical product owners Stay up to date with programming best practices and new technology trends Working autonomously you will bring strong communication skills and the ability to mentor colleagues

Who you are

Passionate about mobile platforms and translating requirements into a user friendly app Excellent knowledge of Kotlin  Strong knowledge of architecture patterns such as MVVM Proven experience of developing and publishing native Android apps to the Google Play store in a professional environment  Good knowledge of Kotlin Coroutines, Hilt and Retrofit. What’s in it for you

Hybrid-working model with 60-Work From Anywhere days* Competitive total compensation package including participation in our stock option plan Market-leading benefits programs and policies shaped by our flexibility-first philosophy* Company-wide and team events — both in-person and virtually! Bitpanda swag to keep you living the brand

And, above all, the opportunity to learn and grow as part of Bitpanda’s incredible journey towards being Europe’s future #1 investment platform. Bitpanda is committed to fostering a fair and equal environment based on trust and mutual respect. We believe that a diverse and inclusive workplace is paramount to our success and we are committed to building a team that represents a wide variety of backgrounds, perspectives, and skills. * These benefits may be adjusted at Bitpanda’s discretion and do not apply to our internships and exceptions to our Hybrid Working policy apply to teams with shift schedules or for folks whose roles require them to be in-office (think: Workplaces team or IT).

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About Us

Chorus One is one of the leading operators of infrastructure for Proof-of-Stake networks and decentralized protocols. Tens of thousands of retail customers and institutions are staking billions in assets through our infrastructure helping to secure protocols and earn rewards. Our mission is to increase freedom and speed of innovation through decentralized technologies.

We are a diverse team of 70+ people distributed all over the globe. We value radical transparency, striving for excellence and improvement while treating each other with kindness and generosity. If this sounds like you, we'd love to hear from you.

Position Overview: As a senior software engineer, you will join one of our engineering teams to assist in building and maintaining tools and automation to support our validator operations. We take the upstream node software from projects like Ethereum, Solana, Cosmos, or Avalanche; compile it; run it on one of our servers; and then make sure it is reliable and secure, monitor it, and keep it up to date. We do this for more than 60 blockchain networks, which means that it is not feasible to do all of this by hand. Instead, we build automation. Some of the things we do:

• Contribute to upstream software to improve observability, and build monitoring tools from scratch where none exist. The teams that build the node software are not the teams that operate this software at scale, and as such, observability is often not a first priority. We develop our own tools for on-chain and off-chain monitoring, both for short-term metrics (to alert on) and long-term metrics to measure our performance, and to support optimisation decisions.

• Build tools to track and manage our fleet of servers. We work mostly with bare-metal servers across multiple providers. This means that no vendor-specific portal is going to give us a complete overview of our infrastructure, instead we have an in-house tool that integrates with vendor APIs and gives us a central overview.

• Automate machine provisioning. Instead of working with 10+ cloud and bare metal providers’ flavor of installing Ubuntu, we build our own installer that is uniform across our infrastructure.

• Track and automate builds. Each of the 60+ networks we operate regularly releases updates. It would be tedious to manually git pull && make for every release, instead we have automation watching for new releases that automatically builds them and registers them in our package registry.

• Automate updates and failover. When we have a new package, we still need to roll it out to our fleet and restart any nodes, in a controlled manner and without downtime. For validating nodes, we also need to fail over before we restart them, and confirm the new node is healthy. To automate this, we need to have 100% confidence in our tooling, because a mistake here can lead to double-signing, which incurs a financial penalty.

• Automate snapshot creation and storage. Blockchains node software is stateful in nature: the chains are often terabytes in size. While it is possible for new nodes to sync from the p2p network, this can take days to weeks, which means it is not a suitable method when we move workloads between machines. We automate taking snapshots of this data, so we can be more flexible about what runs where, without compromising on security.

Our internal tooling:

Itis written in a mix of Rust, Python, Go, and a bit of TypeScript. We use Postgres as our database of choice. We deploy our code either directly onto Ubuntu hosts, running under systemd or in Docker containers, and we also have a Kubernetes cluster running various stateless applications. Due to the diverse nature of the software we run, we also have to occasionally dive into codebases written in C, C++, OCaml, or TypeScript.

You can learn more about our approach to operating nodes in our Network Handbook.

Key Responsibilities

• Design and develop new features. Discuss with internal stakeholders to clarify how ournext feature should look, discuss with fellow engineers how it should be implemented,and then drive implementation to completion.

• Support and collaborate. Review and discuss engineering designs, review code, helpfellow engineers, and mentor them on a technical level.

• Innovation and continuous improvement. Seek to simplify, optimize, and secure ourstaking services and systems.

• Take part in on-call rotation approximately 2 days per month.You will be responsible for automation that manages our validators and infrastructure, including its uptime and incident response.

What we are looking for:

• 5+ years experience as a Software Engineer.

• Experience with operating and maintaining server-side software in production.

• Deep understanding of at least one compiled statically typed programming language such as Rust, Go, Kotlin, C++, or Haskell.

• Experience with at least one scripting language such as Python.

• Experience using SQL databases, preferably PostgreSQL.

• Strong communication skills and ownership to drive new features independently.

• Interest in blockchain technology, in particular distributed systems and consensus algorithms.

• Affinity with infrastructure and the lower levels of Linux userspace.

• You are able to work in the following time zone: Switzerland ± 6 hours.

What We Offer:

🌱 Growth & Learning

We’re committed to your development! Benefit from an annual 3,000 CHF learning budget that goes beyond just conferences—supporting your physical, emotional, and mental well-being too. Attend up to two conferences a year to dive deeper into the Web3 space and connect with the community. Plus, jumpstart your crypto journey with our $1,000 Crypto Starter Kit to explore and engage with cryptocurrencies hands-on.

🤝 Collaborative Culture

Collaboration is woven into our DNA. We thrive in multiplayer settings, ensuring every voice contributes to our mission. Connect across teams through our buddy programs, regular virtual coffee chats, and biannual retreats, which offer unparalleled opportunities to build stronger relationships while tackling some of the industry's most exciting challenges.

✈️ Retreats in Iconic Destinations

Twice a year, we bring the entire team together for all-expenses-paid retreats in inspiring locations. Past retreats have taken us to Kenya, the USA, South Korea, Switzerland, Spain, Turkey, Thailand, Dubai and Japan. Our next stop? Budapest, Hungary! These retreats are designed to recharge, connect, and spark innovation.

🏡 Work From Anywhere

Embrace remote flexibility that empowers you to work from anywhere in the world. Prefer a coworking space? We’ve got you covered with a 500 CHF/month coworking budget. And for those growing their families, enjoy paid parental leave to ensure your personal and professional lives align seamlessly.

🗣️ Radical Transparency

We practice radical candor, fostering an environment of open, honest feedback that helps us grow individually and as a team. Expect a culture where learning from each other is not just encouraged—it’s celebrated.

💸 Compensation & Equity

We offer a competitive fixed salary in your preferred local currency or stable coins, complemented by stock options, giving you a stake in the exciting future we’re building together.

💼 Employment

We offer flexibility to suit your individual needs. With the ability to provide local employment in over 150 countries, you’ll have access to local benefits tailored to your region. Prefer contractor status instead? That’s an option too. During the offer, we work with you to determine the best arrangement, ensuring your experience aligns with your personal and professional preferences.

✨ Curious to see what life at Chorus One is really like? Check out these videos for a behind-the-scenes look:

• Culture at Chorus One

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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. As a Senior Software Engineer in the KYC & Eligibility team, you will be responsible for building and optimizing the onboarding and identity verification processes at Blockchain.com. Your work will ensure that customers can seamlessly and securely access our platform while meeting regulatory and compliance requirements. You will collaborate with engineering, compliance, and product teams, integrating third-party identity verification providers such as Sumsub, Veriff, and DXC, to create a scalable, reliable, and efficient onboarding experience. This role requires strong technical expertise, a problem-solving mindset, and the ability to build systems that are both secure and user-friendly. You will take the lead to design, develop and maintain our onboarding flows, ensuring high availability, low latency, and optimal user experience. WHAT YOU WILL DO Technical Execution & Engineering Excellence

Design, develop, and maintain the KYC & Eligibility platform, ensuring scalability, security, and reliability. Integrate with third-party identity verification providers (Sumsub, Veriff, DXC) and optimize interactions to reduce verification failures and improve user conversion rates. Write high-quality, maintainable, and efficient code while upholding best practices in software development. Set guidelines for observability and the monitoring of KYC services, leveraging tools to improve system performance and debugging capabilities. Work closely with compliance and risk teams to ensure regulatory requirements are met while maintaining a seamless user experience. Improve fraud detection and prevention mechanisms, ensuring that our onboarding flow remains secure and efficient. Collaborate with backend and frontend engineers to enhance the end-to-end onboarding experience. Contribute to technical architecture discussions, ensuring that design choices align with both business goals and system performance.

Collaboration & Cross-Functional Impact

Work closely with engineering, product, and compliance teams to enhance the eligibility and onboarding experience. Participate in code reviews, offering constructive feedback to maintain code quality and consistency. Partner with infrastructure teams to improve deployment processes, ensuring high availability and resilience. Provide technical guidance to junior engineers and collaborate with other teams on shared initiatives.

Continuous Improvement & Innovation

Optimize KYC workflows to balance security, compliance, and user experience. Identify and resolve performance bottlenecks, ensuring smooth onboarding and verification processes. Continuously evaluate and improve eligibility-related automation, reducing manual review overhead and enhancing efficiency. Stay up-to-date with emerging technologies and contribute to process improvements that enhance engineering effectiveness.

WHAT YOU WILL NEED Technical Skills

Proficiency in JVM languages (Kotlin, Java), Kafka and PostgresSQL Experience working with identity verification providers such as Sumsub, Veriff, and DXC. Strong understanding of event driven distributed systems, APIs, and microservices architectures. Knowledge of observability and monitoring tools to maintain system reliability and performance. Familiarity with security best practices, particularly in KYC, fraud detection, and compliance systems. Experience working in high-throughput, low-latency environments where scalability and efficiency are key. Experience with SQL (Postgres) and NoSQL databases (Redis), ensuring optimal data storage and retrieval for KYC processes.

Collaboration & Communication

Ability to work cross-functionally with Compliance, Risk, Product, and Engineering teams to enhance onboarding flows. Strong problem-solving and debugging skills, ensuring quick incident resolution and system improvements. Excellent written and verbal communication skills, ensuring technical discussions are clear and productive.

Preferred Qualifications

Experience working in fintech, crypto, or other highly regulated industries. Prior work on fraud detection, eligibility, or transaction risk systems. Exposure to machine learning models or automation techniques for KYC optimization.

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 Work from Anywhere Policy: You can work remotely from anywhere in the world for up to 20 days per year. 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.

LI-Hybrid

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BitGo is the leading infrastructure provider of digital asset solutions, delivering custody, wallets, staking, trading, financing, and settlement services from regulated cold storage. Since our founding in 2013, we have focused on enabling our clients to securely navigate the digital asset space. With a global presence and multiple Trust companies, BitGo serves thousands of institutions, including many of the industry's top brands, exchanges, and platforms, and millions of retail investors worldwide. As the operational backbone of the digital economy, BitGo handles a significant portion of Bitcoin network transactions and is the largest independent digital asset custodian, and staking provider, in the world. For more information, visit www.bitgo.com.This role will require being full-time onsite at our Palo Alto office to support collaborative team dynamics and innovative problem-solving. BitGo is looking for a Senior Software Engineer to join our Custody Experiences team and help us build a custodial platform for businesses and customers to trade, stake, and manage crypto products. Responsibilities:

Design and build scalable, well abstracted, and robust APIs, libraries, and services to empower our custodial platform Own functionality and scalability features by taking responsibility from inception to deployment and customer integration Expose and document functionality to the UI, third-party developers, and our internal and external tooling Collaborate with cross-functional teams to define, design, and ship new features Write clean, maintainable, and efficient code Ensure the performance, quality, and responsiveness of applications Identify and correct bottlenecks and fix bugs Continuously discover, evaluate, and implement new technologies to maximize development efficiency Participate in code reviews and contribute to a culture of continuous improvement Work closely with product managers, designers, and other engineers to understand and refine product requirements Provide mentorship to your peers in the broader engineering team through code reviews and education on best practices

Skills & Experience:  We are looking for teammates who share and practice our values: open communication, transparency, taking ownership, and a high level of craftsmanship. We are looking for coworkers who share our vision and mission: deliver trust in digital assets.  Required:

6+ years of proven experience of back-end and server-side development Leads or significantly contributes to medium-to-large initiatives including multi-person projects. Great at algorithm design, problem solving, and complexity analysis Strong experience with of TypeScript, Node.js and Kotlin Strong experience with PostgreSQL and MongoDB Strong experience with RESTful API design Strong experience with microservices and service-oriented architectures Champion of unit and functional testing Experience in Git/GitHub and branching methodologies, code review tools, CI tools, etc. Ability to move quickly and adjust course as needed in a fast-paced environment Bachelor’s degree in computer science, applied mathematics, or another technical discipline from a top university Understanding of and strong interest in cryptocurrencies and blockchain

Preferred:

Experience developing consumer-facing crypto products Proven experience building public-facing APIs in a production environment Ability to work full-stack and familiarity with React  Experience working with clients and/or business partners Familiarity with any of the following: digital wallets, clearing and settlement, lending, trading, accounting systems, etc

Why Join BitGo? Disrupting an industry takes vision, innovation, passion, technical chops, drive to deliver, collaboration, and execution. Join a team of great people who strive for excellence and personify our corporate values of ownership, craftsmanship, and open communication. We are looking for new colleagues who bring innovative ways of thinking and problem solving, and who want risks to be part of the team that changes the world’s financial markets. Pay Transparency Notice: Depending upon your leveling and location, the compensation for this role averages between $165,000 - $210,000 base salary. Equity, an annual performance bonus and the benefits outlined below are also a part of this role's package.  Here are some of the benefits* of working at BitGo:

Competitive base salary, bonus and stock options 100% company paid health insurance for employee, partner and dependents Up to 4% 401k company match Paid parental leave, Paid vacation Free commuter/parking pass; 5 min from Caltrain Free custom lunches, dinners and snacks  Computer equipment and workplace furniture to suit your needs Great colleagues and inspiring startup environment

*Benefits may vary based on location  Cryptocurrencies are the most disruptive change the financial services industry has seen in years. Join us and you’ll be able to look back and say you were part of the team that transformed investing.

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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.

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Description

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.

Requirements

• 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

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