Senior Software Engineer, Onchain

Summary

Join Gemini's Onchain team as a Senior Software Engineer (Frontend) and contribute to the development and expansion of blockchain-based products. You will design and implement high-performance web applications using React and TypeScript, integrate smart contract interactions, collaborate with cross-functional teams, and mentor junior engineers. The role requires proficiency in JavaScript, TypeScript, React, and blockchain integration. This position is hybrid, requiring in-person presence twice a week in either Seattle, WA or New York City, NY. Gemini offers a competitive salary, bonus, equity grant, comprehensive health plans, 401k matching, paid parental leave, and flexible time off.

Requirements

• 5+ years of experience building modern front-end applications in a production environment
• Proficiency with JavaScript, TypeScript, React, and front-end testing frameworks (e.g., Jest, Playwright, Cypress)
• Hands-on experience integrating with blockchain applications or protocols (e.g., using MetaMask, WalletConnect, ethers.js)
• Deep understanding of web development fundamentals, including accessibility, performance optimization, and responsive design
• Familiarity with Web3 architecture and concepts such as smart contracts, RPC endpoints, gas fees, and decentralized applications (dApps)
• Strong problem-solving skills and ability to work independently in a fast-paced, remote-first environment

Responsibilities

• Design and implement responsive, high-performance web applications using React and TypeScript
• Integrate smart contract interactions and on-chain data using libraries such as ethers.js and wagmi
• Collaborate with blockchain engineers, product managers, and designers to ship high-quality, user-focused features
• Own the entire front-end development lifecycle, from architecture and implementation to testing and deployment
• Apply secure coding practices and ensure best-in-class performance and accessibility
• Stay up to date with Web3 trends and tooling to continuously evolve our front-end capabilities
• Mentor junior engineers and contribute to a culture of collaboration and technical excellence

Benefits

• Competitive starting salary
• A discretionary annual bonus
• Long-term incentive in the form of a new hire equity grant
• Comprehensive health plans
• 401K with company matching
• Paid Parental Leave
• Flexible time off