Fin is a next-generation payments platform built for high-value, global, and instant transactions. We are looking to hire a Senior Full Stack Engineer to help define how money moves on Fin and build the systems that let Fin handle millions of transactions safely and reliably.
Requirements
- Deep experience with TypeScript and Node.js
- Production experience with React Native.
- Experience owning complex product changes from idea through launch, not just implementing narrow tickets.
- Deep comfort debugging across the stack, from database and infrastructure issues to front end performance problems.
- Solid understanding of security best practices, particularly around authentication, authorization, and handling sensitive data.
- A strong sense of code quality, including testing, readability, and maintainability in a fast moving environment.
- Experience in EITHER traditional fintech integrations (Stripe, Plaid, ACH rails) OR blockchain infrastructure (especially Solana in a production environment).
Responsibilities
- Design, build, and ship full stack features across our web and mobile surfaces, from APIs and services to polished user interfaces.
- Own projects end to end: work with product and leadership to scope requirements, design systems, implement, test, and ship to production.
- Integrate third party payment and financial APIs, including processors, on and off ramps, compliance tooling, and identity providers.
- Build scalable, high performance services that handle real money movement with strong reliability and observability.
- Maintain a high bar for code quality through clean abstractions, tests, and thoughtful code review.
- Collaborate closely with product, design, and operations so that what we ship feels simple for users even when the underlying system is complex.
Other
- Clear written and verbal communication, and an ability to work closely with non engineering partners.
- High tolerance for ambiguity and the necessary shifting targets that exist in an early stage start up environment.
- Prior startup experience where you were an early engineer and had meaningful product ownership.
