Full-Stack DeFi Web Developer

About Us

Re7 Capital is a London-based cryptoasset investment firm, leveraging our deep crypto network and proprietary data infrastructure to drive investment decisions across various DeFi and alpha strategies. Through Re7 Labs, we also collaborate with leading projects and blockchains to design DeFi ecosystems, provide on-chain risk curation, and deliver vault management services.

Our team combines expertise in investment management, data science, and crypto. To support our continued growth, we are seeking a motivated Full Stack Web Developer to join our engineering team. Reporting directly to the Head of Technology, you will take full ownership of our dApps, used to interact with our vault smart contracts.

Responsibilities

• Develop and maintain responsive, user-friendly front-end interfaces using React, Next.js, Vue or similar frameworks.
• Integrate EVM and non-EVM smart contracts using libraries like Ethers.js, Web3.js, Viem, Starknet.js and wallet connectors such as ConnectKit and wagmi.
• Support wallet integrations including MetaMask, Argent X, and Braavos.
• Design and implement scalable back-end services and APIs using Node.js, Express, and related technologies.
• Collaborate with blockchain engineers to interact with smart contracts and on-chain data.
• Implement best practices for security, including wallet connectivity, transaction handling, and protection of user data.
• Deploy and maintain applications on AWS (EC2, Elastic Beanstalk, S3, CloudFront), with a focus on scalability, logging, and monitoring.
• Ensure performance optimization through CloudFront caching, invalidation strategies, and SSL/TLS management.
• Contribute to Whisk infrastructure and security, ensuring resilient and secure production deployments.
• Work closely with designers, PMs, and cross-functional teams to define and deliver new DeFi features and enhancements.
• Implement and maintain interactive UI elements and animations using modern HTML/CSS (including transitions, keyframes, and responsive styling) within PHP-based web applications.

Requirements

Must-Have Skills

• 5+ years of experience in web development, including 3+ years in dApp development.
• Strong knowledge of TypeScript, HTML, and CSS
• Proficiency in Solidity, Web3.js, or similar smart contract tools
• Hands-on experience integrating and interacting with both EVM and Non-EVM smart contracts.
• Experience with modern front-end frameworks (React, Next.js, Vue, etc.)
• Experience with back-end services and APIs (Node.js, Express/Koa/NestJS)
• Database design and management (SQL/NoSQL) for high-frequency transaction data
• Version control system: Git, Github
• Understanding of DeFi concepts and major protocols (e.g., Uniswap, Aave, Curve).
• Solid understanding of DeFi primitives (AMMs, lending protocols, yield strategies, LP management)
• API design and microservices architecture
• Awareness of and ability to support Whisk infrastructure and security requirements.
• Write clean, maintainable, and well-documented code
• Strong problem-solving and debugging skills

Nice-to-Have

• Knowledge of Docker, CI/CD pipelines (especially GitHub Actions)
• Familiarity with AWS (Elastic Beanstalk, EC2, S3, Cloudfront, Cloudwatch and AWS Certificate Manager)
• Familiarity with other languages (Python, Rust, Go, PHP, Bash)
• Familiarity with Linux
• Experience with AI, LLMs, and/or building agentic workflows

Benefits

• A dynamic, collaborative, and highly technical work environment
• Opportunities for professional growth in a rapidly evolving industry
• Remote-first setup with regular opportunities to meet the team in person
• Competitive compensation package

Application Process

Please submit the following:

• Your resume
• A cover letter explaining your interest in the role
• Your response to the following technical challenge:

Challenge:

Describe a high-level architecture and solution for a dApp that supports both EVM and non-EVM wallets (e.g., MetaMask and Braavos). Include considerations for wallet detection, abstraction, and secure transaction signing.