Full Stack Engineer

As a founding Full Stack Engineer on the Polygon Fintech Labs team, you’ll work hand-in-hand with our Engineering Manager to build the foundation of our Financial Service application layer. Together, you’ll collaborate closely with product and design from day one to architect and ship high-impact features that bring real-world financial utility to millions of users. You’ll build everything from backend services and wallet integrations to clean, intuitive user experiences that abstract away blockchain complexity — making stablecoin payments, programmable flows, and financial automation simple, secure, and accessible. Implement wallet and transaction features that enable stablecoin payments, cross-chain bridging, and programmable flows. Integrate third-party wallet SDKs and APIs from key partners like Crossmint to support onboarding, compliance flows, and seamless fiat on/off ramps. Develop robust backend infrastructure and services to enable secure transaction execution, smart contract interactions, and vault access. Collaborate closely with smart contract engineers to connect on-chain logic with performant backend and frontend systems. Work side-by-side with frontend engineers to deliver secure, fast, and delightful user experiences. Contribute to architectural decisions that prioritize scalability, security, code quality, and system reliability across the stack.