Founding Fullstack Engineer

About the role

🚀 FOUNDING FULLSTACK ENGINEER (3–8 YEARS EXPERIENCE)

New York City (5 days on-site) · Top of market + equity + benefits

TL;DR: Build the product that nuclear operators depend on daily. Own features end-to-end. High-leverage IC role with founding-level impact.

THE MISSION

Everstar builds the intelligence layer that makes nuclear power actually deployable—collapsing regulatory workflows from months to days. Gordian already powers engineering and compliance work for utilities, advanced reactor companies, and hyperscalers. We pair deep nuclear domain expertise with world-class product execution and move with startup speed.

Now we need a Founding Fullstack Engineer to turn complex engineering and regulatory workflows into intuitive, production-grade software.

You'll be joining the Apollo Team of Nuclear. You'll build alongside engineers from Tesla, SpaceX, Lockheed Martin, Google, and Microsoft. You'll learn from nuclear and national security experts who cut their teeth at the Nuclear Regulatory Commission, CIA, and NuScale.

THE ROLE (REPORTING TO THE CEO)

Not a contractor. Not a feature factory. This is an ownership-first role.

You'll architect and ship product features end-to-end—from database design to API contracts to pixel-perfect UI. Think 60% frontend / 40% backend with the autonomy to make technical decisions and the accountability to own outcomes.

Most weeks you'll be designing new flows, implementing features, and refactoring systems—then immediately seeing customers use what you shipped.

You will:

- Build user-facing features: translate messy regulatory workflows into clean, intuitive UI/UX that nuclear professionals actually want to use.

- Own the stack: design APIs, optimize queries, implement frontend interactions, and debug production issues—whatever it takes to ship.

- Set product standards: you're early enough to define how we think about code quality, design systems, testing, and the entire product development process.

- Collaborate with domain experts: work directly with nuclear SMEs and AI engineers to understand complex requirements and ship solutions that actually solve problems.

- Balance speed and craft: know when to optimize for polish and when to ship fast; make tradeoffs consciously and communicate them clearly.

- Lead by example: as the team scales, you'll mentor other engineers—but first, you'll prove the playbook yourself.

A sample week: ship new document collaboration feature; refactor search results to improve load time by 40%; pair with AI engineer to integrate new model output; design mockups for compliance workflow redesign; debug production issue reported by customer; review two PRs.

WHAT YOU'VE DONE

- 3–8 years fullstack experience building production web apps. You've shipped features users depend on daily and owned parts of the product top to bottom.