Staff Backend / Platform EngineerFull-Time | Hybrid | New York City or Austin We're looking for a seasoned Backend/Platform Engineer to help build the foundation of a new, API-driven platform that simplifies how money moves through a complex, high-stakes domain. You'll work across systems that touch everything from external developer APIs to internal transaction orchestration-laying the groundwork for reliable, secure, and scalable services as we grow. What You'll Do
- Design and build core backend services that power mission-critical money movement workflows
- Own external-facing APIs and webhook infrastructure used by partners and third parties
- Drive integration with external services and internal platforms to ensure clean, reliable data flows
- Collaborate across product and engineering to build abstractions that balance flexibility with simplicity
- Operate in a fast-paced, collaborative environment with high standards and low ego
- Help scale our system from first tens of millions to hundreds of millions in volume
- Contribute to architectural decisions, dev tooling, and API reliability from day one
What We're Looking For
- 8+ years of backend or platform engineering experience, ideally in fast-paced or startup environments
- Strong experience building and scaling REST APIs and webhook systems
- Experience with transactional systems, reconciliation, or multi-service workflows (e.g. payments, event processing)
- Proficiency in modern backend stacks (e.g., TypeScript, Node.js, Ruby on Rails, PostgreSQL)
- Familiarity with cloud infrastructure (AWS), containerized apps, CI/CD workflows, and systems monitoring
- Strong testing practices and experience with GraphQL or WebSocket APIs is a plus
- Clear communicator, collaborative mindset, and thoughtful decision-making in ambiguity
- Comfortable working onsite 3-5 days/week in either New York City or Austin
Nice to Have
- Background in fintech, infrastructure, or developer-facing platforms
- Experience with data integrity, retry logic, or secure integration handling
- Interest in shaping product decisions as well as platform direction
- A track record of building from 0→1 with clean abstractions and well-documented systems
This is a high-impact opportunity to work on foundational systems without legacy baggage, in a collaborative, high-trust team. If you're excited to build critical infrastructure from the ground up-and want your work to matter day one-this role is for you.