About Polygon Labs

Polygon Labs is a software development company building and developing a network of aggregated blockchains via the Agglayer, secured by Ethereum. As public infrastructure, the Agglayer will bring together user bases and liquidity for any connected chain, and leverage Ethereum as a settlement layer. Polygon Labs has also contributed to the core development of several widely-adopted scaling protocols and tools for launching blockchains, including Agglayer CDK, Polygon PoS & Katana.

Your Role

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 core application layer for our next-generation fintech products. From day one, you’ll collaborate closely with product and design to architect and ship intuitive, high-impact features that deliver real-world financial utility to millions of users. This role requires someone who thrives on crafting polished, performant frontend user experiences while also being comfortable building the backend services that power them. You’ll help simplify complex financial workflows — like payments, vaults, and programmable flows — into seamless, accessible products for everyday users. If you care deeply about building beautiful, frictionless interfaces and are excited by the challenge of engineering high-quality production systems at scale, this is your chance to make an outsized impact.

Your Responsibilities

• Own key frontend experiences: Build clean, responsive, accessible interfaces that simplify complex financial functionality and delight users.
• Integrate third-party SDKs and APIs: Work with leading providers for onboarding, KYC/compliance flows, fiat on/off ramps, and payments.
• Contribute to robust backend infrastructure: Design and maintain services that support transaction execution, data flows, and secure user state.
• Collaborate cross-functionally: Work closely with product, design, and engineering peers to deliver end-to-end features with polish and performance.
• Architect for scale and security: Ensure the systems you build are performant, reliable, and meet the highest standards for security and quality.
• Iterate fast, ship often: Maintain high velocity while delivering production-quality, maintainable code.

What You’ll Need

• 4+ years of full stack engineering experience, ideally in fintech or API-driven environments.
• Strength in frontend development: Deep experience with modern frontend frameworks such as React, Next.js, or similar.