Company Description

Phantom is revolutionizing the way millions of people interact with the crypto ecosystem. Our self-custodial wallet offers a seamless, unified experience for managing accounts and tokens across Solana, Bitcoin, Ethereum, and Polygon, empowering users with a single, convenient solution. By integrating cutting-edge security features and launching innovative tools for an enhanced personalized user experience, Phantom is able to provide a next-generation, safe and easy to use self-custodial wallet for everyone. This strategy has allowed Phantom to achieve significant milestones including surpassing 16 million MAU’s, reaching #1 in the Google play store finance category, and consistently trending as a Top 50 app across all categories, right next to X, PayPal, Coinbase, and ChatGPT.

Role Description

As a Developer Support Specialist, you’ll be the go-to technical resource for developers building on Phantom’s embedded, mobile, and browser extension wallets. You’ll troubleshoot complex issues, guide developers through integration challenges, and advocate for improvements that enhance the developer experience. This role is ideal for someone who thrives at the intersection of engineering, support, and developer advocacy.

Responsibilities

• Serve as the primary escalation point for Level 2 developer support requests.

• Diagnose and resolve technical issues related to wallet integrations, blockchain metadata, and token display.

• Collaborate with internal teams to prioritize and advocate for developer-facing features and fixes.

• Engage with the developer community to gather feedback and foster positive relationships.

• Contribute to and improve technical documentation and resources for developers.

• Train and enhance support AI systems with accurate technical information.

• Customer/developer support ticket handling

Qualifications

• 2–3 years of experience in developer support, developer relations, or a similar technical role.

• Proficiency in React and React Native development.

• Strong understanding of blockchain technologies, particularly Solana and EVM-compatible chains.

• Experience reading and interpreting data from block explorers and blockchain metadata.

• Excellent written and verbal communication skills, with an emphasis on clarity and empathy.

• Ability to prioritize tasks and manage multiple support requests effectively.

Why Work with Us

Opportunity

We are a team of experienced builders in the blockchain and crypto industry. Our journey began from users seeking an easy, seamless path to accessing the crypto ecosystem. This passion fueled our exponential growth, allowing us to onboard over 16M+ active users in just over three years; with our user base growing weekly. Our dedication to a secure and seamless user experience has made us the leading wallet on Solana as well as our multi-chain approach enhances our platform's versatility, meeting the needs of a diverse and growing user base. By staying at the forefront of technology and user expectations, we continue to innovate and set industry standards on self-custodial crypto wallets.

There has never been a better time to work in crypto to help shape the future of innovation with a focus around the wallet experience!

• First impressions matter: Wallets are responsible for a users first impression with crypto and onboarding new users into crypto. By ensuring that a user has a great first-time experience with crypto, we can help supercharge the growth of the entire ecosystem.

• Make crypto easier to navigate: There is no easy way for a user to discover and navigate all that crypto has to offer. Wallets have a unique opportunity to help users not only onboard to crypto but also stay retained by exploring new things to do.

• We live in a multi-chain world: We currently support Solana, Ethereum, Polygon and Bitcoin with more networks to come in the new future. We are focused on creating a unified, multi-chain crypto experience for users.

Benefits

• Competitive salary and equity

• Comprehensive insurance (medical/dental/vision) — 100% covered

• Stipend for your ideal remote set-up

• Flexible hours and a supportive remote environment

• Unlimited vacation: Take time when you need it (and we really mean it!)

• 401(k) retirement plan

• Monthly wellness benefit

• Weekly meal benefit

• Global off-sites

We strongly encourage candidates of all different backgrounds to apply. We believe that our work is stronger with a variety of perspectives, and we’re eager to further diversify our company. If you have a background that you feel would make an impact at Phantom, please consider applying. We’re committed to building an inclusive, supportive place for you to do the best work of your career.

Apply Now:

About CoW DAO

CoW DAO is on a mission to protect Ethereum users from the dangers of DeFi. It does this by supporting the development of CoW Protocol, CoW Swap, MEV Blocker, and CoW AMM, and by funding values-aligned projects through the CoW Grants Program.

CoW Protocol is the second-largest DEX aggregator by monthly volume and the first-largest intents-based exchange. MEV Blocker is currently involved in ~4% of all Ethereum transactions, making it the category leader. CoW AMM is the only live AMM that protects LPs from LVR (loss-versus rebalancing).

As a member of CoW DAO’s core team, you will have the opportunity to shape these essential products, and contribute to the Ethereum ecosystem more broadly.

About the role

Location: We are a fully remote team, and although we hire almost globally, there is a preference for this role to be based in Europe or remote +/- 4 hours CEST time

Please note we’re not hiring from the US, Australia, or New Zealand

Position: Full-time contractor

You’ll be joining the team overseeing the design, monitoring, and enhancement of the CoW Protocol’s solver competition. As the pioneer in intent-based trading, this competition has attracted top players in the field. Building strong relationships between solver teams (those responsible for executing trades onchain) and our core team is vital for the protocol’s growth.

Your role involves providing technical support to solver teams, identifying challenges they face, and collaborating with our core team to enhance the competition. You’ll also develop essential components for monitoring the competition, ensuring compliance and user protection. This journey will deepen your understanding of blockchain intents and our batch-auctions-based approach, exposing you to valuable data for insightful analysis. Ultimately, you’ll play a crucial role in ensuring the CoW Protocol’s solver competition operates effectively, in line with the CoW DAO’s principles of fairness, safety, and decentralization.

What you’ll do

• Provide technical support to solver teams; keeping them updated, gathering their input, and troubleshooting any issues that arise
• Dive deep into the competition dynamics, understanding the needs of solvers, and crafting tools to enhance competition monitoring
• Engage in various implementation tasks for the solver competition, like setting up rewards systems, managing token balances, and refining price data feeds
• Apply data analysis techniques to gain insights on the behavior of both our users and solvers, and design metrics to evaluate how strong our trading mechanism is
• Explore the fundamental Game Theory principles guiding the competition’s mechanics and rules
• Help towards the further decentralization of the solver competition

Who you are

• You’re skilled in coding, especially in Python, and familiarity with Rust is a bonus
• You’re proficient in SQL and comfortable navigating databases
• You’re intrigued by the Game Theory principles driving the mechanics of the solver competition
• You’re passionate about blockchain technology and advocate for a decentralized future in digital currencies
• You thrive on tackling complex problems, utilizing a range of tools, from algorithms to data analysis, to find effective solutions
• You enjoy collaborating with multiple teams, communicating openly to grasp their challenges and work together towards solutions
• You’re eager to develop a diverse skill set, delving deep into the blockchain technology supply chain and understanding the interactions among various entities, with a focus on the Ethereum blockchain

What we can offer you

• Flexible work environment: Join our hub in Lisbon or work remotely
• Token plan: Have a stake in our mission and shape the future of CoW DAO
• Periodic gatherings: Enjoy opportunities to connect with the rest of the team through regular trips
• Conference allocation: Stay up-to-date with ecosystem advancements using our conference budget
• Learning budget: Use our learning budget to support your higher ambitions
• Hardware budget: Take advantage of a hardware budget for acquiring necessary equipment
• Make an impact: You are joining a startup where you can make a huge difference. Your work matters!
• Flat hierarchies mean fewer processes and bureaucracy - see more of your ideas come to life!
• Flexible work and vacation times: Prioritize work-life balance through our robust flexible work policy and vacation allowance
• Growth: If you’re someone who loves taking the initiative and getting things done, CoW offers lots of opportunities for your individual growth

Culture

Life within the CoW Protocol is an incredible adventure! We take pride in our collaborative approach, embracing autonomy and fostering a culture of big thinking and continuous growth. We value impact, ownership, simplicity, and team spirit. Plus, we’re all about feedback, coming together, and enjoying the journey along the way!

At CoW Protocol, we strive to create a space where everyone feels included and empowered. We believe that our products and services benefit from our diverse backgrounds and experiences. All qualified applicants are considered for positions regardless of race, ethnic origin, age, religion or belief, marital status, gender identification, sexual orientation, or physical ability.

Job Description As a Quantitative Developer at Kronos, you will directly work as a team member in a world-class trading team, providing technical support and growing with the team. You will collaborate directly with quantitative researchers to expand trading opportunities and implement high-frequency trading algorithms. You will leverage cutting-edge technology to solve complex real-world problems in a fast-paced environment. Being directly affiliated with a trading team means your rewards will be directly tied to the team's performance, presenting a valuable opportunity for you as the bull market approaches. Responsibilities

Strategy Implementation and Maintenance: Develop new trading logic to address specific trading requirements. Maintain and optimize existing trading strategies. Provide technical support for the long-term development of the trading team. DeFi Integration: Extend our existing infrastructure to enable algorithmic trading on various DeFi protocols. Design and write smart contracts in solidity to support trading securely. Stay updated on changes in the DeFi APIs and follow industry best practices.

Qualifications

Advanced training (Bachelor, Master, Ph.D.) from a top school in Computer Science, Math, Statistics, Physics, Financial Engineering, Economics, or another highly quantitative field. Able to read, write, compile, and deploy smart contracts in solidity. In-depth technical understanding of DeFi protocols and DevOps best practices while interacting with DeFi protocols. Familiar with Python within a Linux environment. Enthusiastic and actively passionate about trading. Ability to work in a fast-paced environment and adapt to changes in the financial landscape. Strong communication skills and a proven ability to engage effectively with team members.

Preferred Qualifications

Understanding financial markets, exchanges, high-frequency trading, cryptocurrencies, and practical trading experience in financial markets or related domains. Over 2 years of hands-on experience in DeFi, DApps, smart contracts, etc. Proficiency in modern C++, or ability to quickly learn modern C++. Proficiency in SQL and bash programming.

Apply Now:

Job Description As a Quantitative Developer at Kronos, you will directly work as a team member in a world-class trading team, providing technical support and growing with the team. You will collaborate directly with quantitative researchers to expand trading opportunities and implement high-frequency trading algorithms. You will leverage cutting-edge technology to solve complex real-world problems in a fast-paced environment. Being directly affiliated with a trading team means your rewards will be directly tied to the team's performance, presenting a valuable opportunity for you as the bull market approaches. Responsibilities

Strategy Implementation and Maintenance: Develop new trading logic to address specific trading requirements. Maintain and optimize existing trading strategies. Provide technical support for the long-term development of the trading team. Integration and Maintenance of Exchange APIs: Integrate and maintain exchange APIs. Optimize API connections for low-latency and high-performance trading systems. Ensure the security and stability of API connections. Integrate the API with existing trading programs. Stay updated on changes in exchange APIs and follow industry best practices.

Qualifications

Advanced training (Bachelor, Master, Ph.D.) from a top school in Computer Science, Math, Statistics, Physics, Financial Engineering, Economics, or another highly quantitative field. Proficiency in modern C++ and Python within a Linux environment. Expertise in object-oriented programming, design patterns, and proficiency in data structures and algorithms. Comprehensive understanding of RESTful APIs, WebSocket, HTTP, WebSocket, FIX, GRPC, and other communication protocols.  Enthusiastic and actively passionate about trading. Excellent problem-solving skills and attention to detail. Strong communication skills and a proven ability to engage effectively with team members.

Preferred Qualifications

Understanding financial markets, exchanges, high-frequency trading, and cryptocurrencies. Hands-on experience in low-latency C++ programming and API integration. Proficiency in SQL and bash programming.

Apply Now:

Job Description As a Software Engineer in Trading team at Kronos, you will directly work as a team member in a world-class trading team, providing technical support and growing with the team. You will collaborate directly with quantitative researchers to expand trading opportunities and implement high-frequency trading algorithms. You will leverage cutting-edge technology to solve complex real-world problems in a fast-paced environment. Being directly affiliated with a trading team means your rewards will be directly tied to the team's performance, presenting a valuable opportunity for you as the bull market approaches. Responsibilities

Strategy Implementation and Maintenance: Develop new trading logic to address specific trading requirements. Maintain and optimize existing trading strategies. Provide technical support for the long-term development of the trading team. Integration and Maintenance of Exchange APIs: Integrate and maintain exchange APIs. Optimize API connections for low-latency and high-performance trading systems. Ensure the security and stability of API connections. Integrate the API with existing trading programs. Stay updated on changes in exchange APIs and follow industry best practices.

Qualifications

Advanced training (Bachelor, Master, Ph.D.) from a top school in Computer Science, Math, Statistics, Physics, Financial Engineering, Economics, or another highly quantitative field. Proficiency in modern C++ and Python within a Linux environment. Expertise in object-oriented programming, design patterns, and proficiency in data structures and algorithms. Comprehensive understanding of RESTful APIs, WebSocket, HTTP, WebSocket, FIX, GRPC, and other communication protocols.  Enthusiastic and actively passionate about trading. Excellent problem-solving skills and attention to detail. Strong communication skills and a proven ability to engage effectively with team members.

Preferred Qualifications

Understanding financial markets, exchanges, high-frequency trading, and cryptocurrencies. Hands-on experience in low-latency C++ programming and API integration. Proficiency in SQL and bash programming.

Apply Now:

Job Description As a Quantitative Developer at Kronos, you will directly work as a team member in a world-class trading team, providing technical support and growing with the team. You will collaborate directly with quantitative researchers to expand trading opportunities and implement options trading strategies. You will leverage cutting-edge technology to solve complex real-world problems in a fast-paced environment. Being directly affiliated with a trading team means your rewards will be directly tied to the team's performance, presenting a valuable opportunity for you as the market grows. Responsibilities

Options Strategy Implementation and Maintenance: Develop new trading logic to address specific trading requirements. Maintain and optimize existing trading strategies. Provide technical support for the long-term development of the trading team. System Architecture Optimization: Develop system performance monitors and enhance system performance by optimizing bottlenecks and refactoring system architecture.

Qualifications

Degree: Advanced training (Bachelor, Master) in Computer Science, Math, Statistics, Physics, Financial Engineering, Economics, or another highly quantitative field.

Proficiency:

Programming Languages: Proficiency in C++, Java, or Golang within a Linux/Unix environment. Software Engineering: Expertise in object-oriented programming, proficiency in data structures and algorithms, and ability to develop fault-tolerant systems. Quality Assurance: Capable of producing readable, clean, well-structured, maintainable, and efficient code. Independent Working Capability: Able to independently implement features with tests, prioritize high-impact issues, and identify defects and bugs promptly. Relational Database: Design and maintain relational databases, write efficient queries

Personality:

Enthusiastic and actively passionate about trading. Excellent problem-solving skills and attention to detail. Ability to work in a fast-paced environment and adapt to changes in the financial landscape. Display a high level of accountability and responsibility. Strong communication skills and a proven ability to engage effectively with team members.

Preferred Qualifications

Understanding financial markets, options trading, and cryptocurrencies, along with practical trading experience in financial markets or related domains. Proficiency in risk management skills, including but not limited to options greeks. Over 2 years of hands-on experience in C++, Java, or Golang. Demonstrated expertise in system architecture design and implementation Experienced in design and implementing efficient SQL database schema Familiar with common network protocol stack such as IP, TCP, TLS, HTTP, and web socket.

Apply Now:

Hudson River Trading’s coders work on small, highly productive, and efficient teams that design, improve, and maintain the technology that powers worldwide trading — at HRT, the code you write is our business. You’ll have an opportunity to work alongside a range of developers across the firm who write trading algorithms, monitor trading, build and maintain a world-class research environment, and more! As a Treasury Infrastructure Software Engineer, you will be responsible for designing, developing, and maintaining software solutions that support our treasury functions. You will work closely with our Funding, Finance, and Optimization teams to ensure our treasury systems are efficient, secure, and scalable. Responsibilities

Software Development: Design, develop, and implement treasury software applications using C++ and/or Python, ensuring high performance and responsiveness System Integration: Collaborate with Treasury and Finance teams to integrate the software solutions with the existing platform Infrastructure Management: Maintain and optimize treasury infrastructure, including databases, cloud services, and network configuration Automation & Optimization: Identify opportunities for automation and process improvement within treasury operations Support & Troubleshooting: Provide technical support for treasury systems and resolve any issues promptly Compliance & Security: Ensure all treasury systems comply with regulatory requirements and security protocols

Qualifications

Bachelor’s degree in Computer Science and/or a related field Proven experience building treasury infrastructure Strong proficiency in C++ and/or Python programming and knowledge of object-oriented design principles Knowledge of treasury operations, cash management, and financial instruments is a plus Strong problem-solving skills and ability to work in a fast-paced environment Excellent communication skills and ability to collaborate with technical and non-technical teams Familiarity with database technologies (SQL, NoSQL) and data modeling are a plus

The estimated base salary range for this position is $150,000 to $250,000 per year, based on job-related skills and experience. This role will also be eligible for discretionary performance-based bonuses and a competitive benefits package.Culture Hudson River Trading (HRT) brings a scientific approach to trading financial products. We have built one of the world's most sophisticated computing environments for research and development. Our researchers are at the forefront of innovation in the world of algorithmic trading. At HRT we welcome a variety of expertise: mathematics and computer science, physics and engineering, media and tech. We’re a community of self-starters who are motivated by the excitement of being at the cutting edge of automation in every part of our organization—from trading, to business operations, to recruiting and beyond. We value openness and transparency, and celebrate great ideas from HRT veterans and new hires alike. At HRT we’re friends and colleagues – whether we are sharing a meal, playing the latest board game, or writing elegant code. We embrace a culture of togetherness that extends far beyond the walls of our office.Feel like you belong at HRT? Our goal is to find the best people and bring them together to do great work in a place where everyone is valued. HRT is proud of our diverse staff; we have offices all over the globe and benefit from our varied and unique perspectives. HRT is an equal opportunity employer; so whoever you are we’d love to get to know you.

Apply Now:

What are we all about?

We are a team of builders and researchers on a mission to empower enterprises and developers worldwide to access and build on decentralized systems.

Our expertise covers several domains: Ethereum and Starknet protocol engineering, layer-2, AI, cryptography research, protocol research, decentralized finance (DeFi), security auditing, formal verification, real-time monitoring, smart contract development, and dapps and enterprise engineering.

Working to solve some of the most challenging problems in the blockchain space, we frequently collaborate with renowned companies, such as Ethereum Foundation, Starknet Foundation, Gnosis Chain, Flashbots, Forta Protocol, Lido, EigenLayer, Open Zeppelin, RISCZero, Aleph Zero, and many more.

Today, we are a 350+ strong team working remotely across 66+ countries.

Are you the one?

The Role:

We are seeking an Infrastructure Engineer with strong expertise in identity management and system integrations. This role focuses on maintaining our authentication infrastructure, managing integrations, and providing technical support to ensure smooth operations across our engineering organisation.

Primary Responsibilities

• Implement and maintain Okta-based identity management solutions
• Configure and manage integrations between various cloud services and internal applications
• Handle access control and RBAC implementation across our technology stack
• Provide DevOps support and troubleshoot integration issues
• Maintain CI/CD infrastructure and deployment pipelines
• Create clear documentation for processes and integrations

Technical Requirements

Strong understanding of:

• SAML, OAuth, and SSO implementations
• RBAC and access management
• Okta administration and integration patterns
• Cloud IAM (AWS IAM, GCP IAM)

Experience with:

• Infrastructure as Code (Terraform, Ansible)
• CI/CD tools (GitHub Actions)
• Cloud platforms (GCP and/or AWS)
• Basic scripting in Python or Go
• 2-5+ years of infrastructure/DevOps experience

Key Skills

• Strong troubleshooting and problem-solving abilities
• Experience in managing DevOps related requests efficiently
• Clear technical documentation skills
• Effective communication with technical and non-technical stakeholders
• Ability to manage multiple integration projects

Nice to Have

• Blockchain technology exposure
• JFrog Artifactory experience
• Experience with multi-factor authentication implementation
• Knowledge of security best practices

Day-to-Day Activities

• Managing Okta configurations and integrations
• Handling access control and user provisioning
• Supporting teams with authentication and authorization needs
• Implementing and maintaining security standards
• Responding to and resolving DevOps support requests
• Automating routine tasks and workflows

Keep up to date on what we are working on by following us on our social channels:

• Discord
• LinkedIn
• Twitter