Staff Backend Engineer
Job Description
Staff Backend / Platform Engineer
Full-Time | Hybrid | New York City or Austin
We’re seeking 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 powering 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 teams to build abstractions balancing flexibility with simplicity
Operate in a fast-paced, collaborative environment with high standards and low ego
Help scale our systems from tens of millions to hundreds of millions in volume
Contribute to architectural decisions, developer 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 system monitoring
Strong testing practices and experience with GraphQL or WebSocket APIs is a plus
Clear communicator with a collaborative mindset and thoughtful decision-making in ambiguity
Comfortable working onsite 3–5 days/week in New York City or Austin
Average salary estimate
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