Full Stack Engineer

At Pylon, we’re a small team building a very ambitious product in the mortgage space.
At this early stage, we’re looking for engineers who can see the opportunity of what we’re building towards and want to shape the user experience of a deeply technical product.
We're in search of full stack engineers who love turning complexity into clarity and who sweat the details in service of usability, performance, and craft. If you thrive on building fast, expressive interfaces and care deeply about the experience behind every click, Pylon could be a great place for you.

About you

You:

• Care about the full stack, but specialize in the last mile. You know CSS like the back of your hand —but you can reason across the stack and know how to integrate cleanly with backend systems.

• Have strong product instincts. You think in flows, not just components. You’re motivated by how users feel, how quickly they understand something, and whether they trust what they see.

• Embrace constraints. Designing great UX in a highly regulated, high-stakes domain is a hard problem. You’re energized by solving for clarity in a complex space.

• Know your tools and push them hard. Whether it’s squeezing performance out of a rendering path or designing a type-safe form builder, you love building polished, maintainable UI code that scales.

• Work autonomously and with impact. You don’t wait around for perfect specs or throw pixels over the wall. You collaborate tightly with engineers, designers, and PMs to build and iterate quickly.

• Love strong typing. We use TypeScript across the stack and care a lot about types as a tool for correctness, clarity, and iteration speed. You probably do too.

About the Team

What we’re not:

Building a CRUD app: We’re building a platform that’s only possible due to deep technology investments and thinking hard from first principles. Cargo-culting what’s come before won’t be sufficient. If you’re looking to do mostly plumbing / lego piece assembling, Pylon may be very frustrating for you

An LLM wrapper: Mortgage is a sprawling mess of problems, and there isn't one tool that solves every one of them. We use LLMs, but we've reached for tools in multiple disciplines like mixed-integer linear optimization and programming language research.

An easy job: We’re building a lot of things from the ground up for the first time. Working at Pylon is like a research project where you have to ship to intelligent, opinionated customers regularly. It’s basically guaranteed you’ll be handed a task that is too difficult for you to do. You might fail sometimes. You might have no idea where to start. Our team leans heavily on each other, but there’s no getting around the difficulties.

What we are:

A small team: We don’t have an army of engineers. If you find something is broken, you are probably the best one to fix it. All the code we write has to punch above its weight in maintainability and toil reduction. If you have a good idea, you have much more ability to put it into action than at a large company.

We need generalists: Specialization is for big companies that already have everything figured out. If you’re smart, flexible and like getting into everything, we want you.

Working in a regulated space: Mortgage is regulated both federally and at the state level. We move fast, but breaking things isn’t an option.

About the Job

Basics
Job title: Full Stack Engineer
Stock options: Own a piece of the company and we all win together
Benefits: Health insurance, 401K, dental, etc.

Our technology stack:
We don’t require that you’ve worked with any of these technologies before—this is just our stack for your reference:

• TypeScript (frontend and backend)

• Web Components & React

• GraphQL

• Nx build system

• PostgreSQL

• Sagittarius

• AWS stack using CDK for declarative infrastructure

• NestJS on the backend

In this role, you’ll:

• Build and own core workflows that define how users interact with Pylon

• Collaborate closely with design and backend to ship high-impact features

• Bring structure, clarity, and polish to complex forms and workflows

• Write clean, well-typed code that balances speed and maintainability

• Help evolve our frontend architecture as the product grows

• Push for consistency and usability across the interface

• Work to evolve our mortgage GraphQL API

About Pylon

The $13 trillion mortgage industry at the core of the American economy runs on broken assembly lines with human-powered workflows, stitched-together software, and a series of capital markets intermediates. The costs to originate are at an all time high despite foundational shifts in technology.

Pylon is rewiring mortgages from the ground up. We are building the only API-first, programmatic infrastructure that fully automates credit, compliance, capital, and operations. For the first time, originators can build and scale mortgage businesses entirely through software, not people. Our team comes from Stripe, Better, and Affirm, and we are backed by Conversion Capital, QED, Citi, Fifth Wall, Peter Thiel, and the founders of Ramp, Mercury, Blend, and others.