Backend Engineer, API

Remote

Requirements

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.
Our future API encodes choice, branching, and path-dependence natively.
You'll think about breaking changes, versioning, onboarding, and the full lifecycle of an API that real companies depend on.

About Pylon America’s $13T mortgage market is one of the most important financial systems in the world.
We started from zero and created the first vertically integrated mortgage platform that turns origination into a single API.
Join us in building America’s mortgage rails.
Mortgage is a surprisingly rich domain to model.
We're building one that embraces it — encoding the real shape of mortgage into a surface that's impossible to misuse and delightful to build against. HERE IS
WHAT YOU'LL DO - 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.
Our API should make the mortgage process impossible to get wrong.
Mortgage flows aren't linear wizards.
TECH STACK - TypeScript - GraphQL (this is the product) - NestJS - SQL (PostgreSQL) - Temporal.io http://Temporal.io (workflow orchestration) - Event-driven architecture - AI-driven development tooling and agentic infrastructure WHO WILL SUCCEED HERE Someone who: - Is deeply curious - Wants to own features from design to development to deployment to maintenance - Is willing to put the work in to solve the hardest of problems Location: Palo Alto , CA Base Salary Range: $140,000/yr to $220,000/yr + Equity +

It underwrites the middle class and is the mechanism through which millions of families build wealth.
Publicly traded companies and the country’s largest originators are already building on Pylon.
We’re backed by Peter Thiel, Conversion Capital, QED, Citi, Fifth Wall, and the founders of Ramp, Blend, and Mercury.