Senior Frontend Engineer

Job Description Voici un poste à distance. A leading provider and Developer of DeFi infrastructure and software, building the next generation of on-chain finance and DeFi liquidity infrastructure on Solana, and offering a dual-protocol system designed to help safeguard traders from major market events for the safety and growth of crypto worldwide. Their offer tackles current DeFi platforms' reliance on over-collateralized lending, forcing users to lock up liquidity, juggle multiple protocols, and face high liquidation risks. Their solution enables under-collateralized borrowing, programmable margin accounts, and composable strategies, all through one seamless app. It unlocks capital efficiency, reduces risk, and makes DeFi more accessible and powerful. MISSIONS As a Lead / Senior Front-End Engineer to own and drive the frontend of the Product's platform. You embody a foundational hire and will shape the company's product user experience, architecture, and frontend culture. As the go-to person for all things frontend, you'll : Lead FE development across the App portfolio, including margin dashboards, Recipes, restaking flows, and advanced DeFi integrations. Design, implement, and maintain a scalable frontend architecture (React / TypeScript). Own Solana integrations: from transaction flows to real-time on-chain data visualization. Collaborate closely with design, backend, and product to define and deliver features. Establish best practices for code quality, testing, and deployment. Help build and mentor the frontend team as the App grows. Responsibilities Lead FE vision: Define architecture, frameworks, and coding standards. Build & ship: Develop core UI / UX features with React, TypeScript, and Solana web3 libraries. Integrate deeply with Solana: Wallet adapters, transaction flows, margin accounts, adapters (e.g., Jupiter), and restaking systems. Optimize UX: Create responsive, real-time, high-performance interfaces. Collaborate: Partner with backend and product teams to deliver roadmap milestones. Mentor & scale: Guide future FE hires, review code, and foster engineering excellence. Profil Must have : Strong experience building and shipping production frontends (React + TypeScript). Proven Solana expertise: wallets, web3 libraries, transaction flows, and on-chain integrations. Experience with real-time data, state management, and error handling in blockchain UIs. Track record of leading projects or teams — ownership of architecture and delivery. Excellent communication and collaboration skills in startup environments. Nice to have : Experience with DeFi protocols, margin trading, or restaking mechanics. Prior startup or founding engineer experience. Contributions to open-source Solana or DeFi projects. Informations contractuelles Contract: Permanent role (Hybrid remote) in Paris (France) or other EU countries or US (EST times). Remote first company: flexibility to work fully remotely or at an office location of your preference within the European Union. Salary: up to 220k USD (or 190 K€) per year on a full-time permanent work contract. Equity: 100-200 stock options vested over 4 years with a one-year cliff. Benefits: healthcare and life insurance, retirement plan, sponsored transportation, gym, lunch card, home office equipment, and other perks. Recruitment process : Founder / CEO Interview to understand your background, motivations, and high-level alignment with the company’s mission. (career journey and goals, interest in the company and the role, culture fit assessment) : 45 minutes Technical Interview to assess technical skills and problem-solving ability relevant to the position. (Practical problem-solving or coding exercise, discussion of past projects and technical decisions, evaluating depth of expertise and approach to challenges) : 60 minutes Group Interview to determine cultural and interpersonal fit (Collaboration and communication style, alignment with the company’s values, work ethic, ownership, and adaptability), team dynamics and personality alignment : 45 minutes Final Interview with the CEO to ensure mutual clarity and readiness to move forward. (Expectations, offer details, next steps, remaining questions) : 30 minutes Requirements Must have : Strong experience building and shipping production frontends (React + TypeScript). Proven Solana expertise: wallets, web3 libraries, transaction flows, and on-chain integrations. Experience with real-time data, state management, and error handling in blockchain UIs. Track record of leading projects or teams — ownership of architecture and delivery. Excellent communication and collaboration skills in startup environments. Nice to have : Experience with DeFi protocols, margin trading, or restaking mechanics. Prior startup or founding engineer experience. Contributions to open-source Solana or DeFi projects. #J-18808-Ljbffr