Product Engineer, Crypto Payments

About the role

Fun builds the infrastructure behind consumer-facing fintech applications, handling onboarding, account access and money movement so users can interact with blockchain-based systems as easily as with traditional finance. It is looking for a Product Engineer (Mid, Senior or Staff) to help shape the future of crypto payments. You will 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.

The role is primarily in-person at the company's Midtown, NYC headquarters, with Monday through Thursday in the office and optional WFH Fridays.

Key responsibilities

• Design and scale SDK software that powers Checkout across web2 and web3 environments
• Work across the stack on systems that balance performance, reliability and UX
• Collaborate closely with protocol, backend and business teams to solve complex challenges
• Build tools that scale globally to meet the demands of on-chain payments

Required profile

• 3+ years of engineering experience with JavaScript, TypeScript and modern frameworks
• Proven track record building scalable, high-performance software
• Crypto experience is a plus; fast learners from any technical background are welcome
• Nice to have: familiarity with blockchain technologies and EVM-compatible networks, and experience on payments, SDKs or crypto-related systems

Required skills

• JavaScript and TypeScript
• React and backend APIs
• Full-stack development

What sets you apart

• Contributions to open-source projects or built SDKs/dev tools
• Shipped products from 0 to 1 in a fast-paced setting
• Thrives in ownership-heavy environments and takes pride in execution