Product Engineer

At Fun, we’re building the financial infrastructure for internet capital markets.

The systems that power global finance were designed for a different era: slower, fragmented, and constrained by borders. Today, value is digital, global, and moves instantly, but the experience of moving it hasn’t caught up.

Fun offers the highest converting payment solution in the digital asset space – a unified system that enables users to complete any on-chain action using crypto, exchange balances, or fiat from a card or bank account, all in a single, seamless flow.

Our goal is simple: make transacting with any asset feel effortless, anywhere in the world.

About the Role

We'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.

• 3+ 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

• Familiarity with blockchain technologies and EVM-compatible networks
• Comfortable solving difficult technical problems in agile environments
• Experience working on payments, SDKs, or crypto-related systems
• Passion for building secure, efficient, and accessible tools

• You've contributed to open-source projects or built SDKs/dev tools
• You have shipped products from 0 to 1 in a fast-paced setting
• You thrive in ownership-heavy environments and pride yourself on execution
• You approach problem-solving with thoughtfulness, precision, and rigor

Why 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 providers

Location 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.