Backend Engineer, API

## About the role Define what a mortgage is in code. Seriously. You'll work on semantic models that don't just represent mortgages as they exist today — they expand what a mortgage can be. This is product design at the API layer. Build toward an event-driven API. We're moving to a world where our API doesn't just respond to requests — it tells you what happened, why, and what you can do next. You'll help design and ship that future. Make the complex feel simple. Our API should make the mortgage process impossible to get wrong. That means thoughtful abstractions, clear documentation, and an obsessive focus on developer experience. Design for nonlinearity. Mortgage flows aren't linear wizards. Our future API encodes choice, branching, and path-dependence natively. You'll work on guided experiences that model real-world complexity without exposing it as chaos. Treat this as a product surface. You'll think about breaking changes, versioning, onboarding, and the full lifecycle of an API that real companies depend on. ## Tech Stack - TypeScript - GraphQL (this is the product) - NestJS - SQL (PostgreSQL) - Temporal.io (workflow orchestration) - Event-driven architecture - AI-driven development tooling and agentic infrastr