Product Engineer

At Fun.xyz, we believe a tokenized future is a beneficial inevitability, granting financial emancipation to everyone with an internet connection. For a blockchain-first global economy to exist, value exchange must become intuitive, secure, and seamless. Enter Checkout - the highest converting payment solution in web3. By integrating Checkout, dApps enable users to complete any on-chain action using crypto from a wallet, centralized exchange, or on-ramped fiat from a card or bank account. With access to market-leading routing and their asset portfolio at the point of sale, users are faster, stickier, and more engaged. For dApps, Checkout scales their user acquisition potential without launching new chains or integrating multiple third party providers.We built Checkout because we envision a world where anyone, anywhere, can purchase anything with any asset. If that sounds like a vision you can get behind, we want to hear from you.About the RoleWe're looking for a talented Product Engineer (Mid, Senior, Staff) to join our team and help shape the future of crypto payments. In this role, you'll design and scale SDK software that powers Checkout across web2 and web3 environments, working across the stack on systems that balance performance, reliability, and UX. You'll collaborate closely with protocol, backend, and business teams to solve complex challenges and build tools that scale globally to meet the evolving demands of on-chain payments. Crypto experience is a plus, but fast learners from any technical background are welcome.Requirements3+ years of engineering experience with JavaScript, TypeScript, and modern frameworks>Strong understanding of full-stack development, including React and backend APIs>Attention to detail in both product design and user interaction>Proven track record building scalable, high-performance software>Nice to HaveFamiliarity with blockchain technologies and EVM-compatible networksComfortable solving difficult technical problems in agile environmentsExperience working on payments, SDKs, or crypto-related systemsPassion for building secure, efficient, and accessible toolsWhat Sets You ApartYou've contributed to open-source projects or built SDKs/dev toolsYou have shipped products from 0 to 1 in a fast-paced settingYou thrive in ownership-heavy environments and pride yourself on executionYou approach problem-solving with thoughtfulness, precision, and rigorWhy Join Us• Shape the future of payments and programmable money• Work with bleeding-edge tech in a domain where innovation moves fast• Join a mission-driven team focused on access, openness, and trust• Be a key contributor, not just a cog-your work will ship fast and matter• Collaborate with top-tier protocols, builders, and financial infrastructure providersLocation and Work Environment This role is primarily in-person at our Midtown, NYC headquarters. We work together Monday through Thursday for fast, iterative collaboration and optional WFH Fridays to reset and recharge.