Software Engineer - Full-stack

Company Overview

Promise modernizes how government agencies and utilities support people in financial difficulty. We build technology that makes it simple for residents to receive benefits, engage with assistance programs, set up flexible payment plans, and stay on track—while helping agencies increase efficiency, recover revenue, and deliver services with dignity. Our mission is to transform public systems so they work better for everyone, especially the most vulnerable.

Our team includes experts from companies like Palantir, Google, Stripe, and esteemed government leaders. We work hard and believe deeply in what we do. We're looking for excellent people to build innovative, resilient technology. Backed by over $50 million in funding from top investors—such as Reid Hoffman, Howard Schultz, Michael Seibel, Y Combinator, 8VC, The General Partnership, First Round Capital, Kapor Capital, XYZ Ventures, and Bronze Investments—Promise has been recognized as one of Fast Company's "World's Most Innovative Companies of 2022," “Forbes Next Billion-Dollar Startups 2024,” and Y Combinator’s #1 Gov Tech startup.

At Promise, we’re building technology that helps families stay afloat—turning financial stress into stability through flexible, affordable payment solutions. As a Senior Full-Stack Software Engineer with a frontend focus, you’ll shape the way people directly experience that mission.

You’ll design and build intuitive, high-impact web applications that connect individuals facing financial hardship with essential public services. Using modern tools like React, Type Script, and Graph

QL, you’ll craft seamless user journeys powered by robust backend systems.

This is a hands‑on role for someone who cares deeply about product experience and engineering craft. You’ll move fluidly between frontend architecture and backend integrations, mentor teammates, and help define how we build as we scale. If you love turning complex systems into elegant user experiences — and want your work to matter — this role is for you.

Why This Role Is Different:
We’re still early enough that your architectural decisions will shape the foundation of our product — but far enough along that your work will immediately impact real users at scale.

At Promise, your code won’t just render UI. It will reduce stress, increase access, and improve how people interact with critical financial systems.

If you’re excited about building beautiful, resilient systems that make a tangible difference in people’s lives, we’d love to meet you.

Build with impact

Design and deliver scalable, reusable frontend systems and components that power critical financial workflows used by thousands of families each month.

Craft exceptional experiences

Collaborate closely with product and design to create intuitive, accessible, and high‑performing web applications that guide users through complex payment and relief flows with clarity and empathy.

Bridge frontend and backend

Partner with backend engineers to define and evolve APIs, contribute to service design when needed, and ensure data flows cleanly from distributed systems to user interfaces.

Architect for scale

Help shape our frontend architecture, state management patterns, orchestration layers, and shared component libraries as we grow.

Raise the bar

Write clean, maintainable, production‑ready code. Identify and resolve performance issues, edge cases, and UX friction points to maintain a high quality bar.

Lead and mentor

Support and mentor engineers, contribute to thoughtful code reviews, and help cultivate a culture of ownership, curiosity, and engineering excellence.

Experience

3+ years building production‑grade software, with significant experience in modern frontend development.

Frontend Expertise

Strong proficiency in React and Type Script. Experience building complex user flows, managing application state, and integrating APIs at scale.

Full‑stack Fluency

Comfortable working across the stack — contributing to backend services (Node, Graph

QL, REST, etc.) when needed to unblock progress and improve end‑to‑end delivery.

Systems Thinking

Ability to translate complex distributed…