> Markdown version of [/jobs/ext/4628317-software-engineer-front-end-systems](https://www.wearedevelopers.com/jobs/ext/4628317-software-engineer-front-end-systems). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Software Engineer, Front-End Systems

- **Company:** Stealth AI Startup
- **Location:** San Francisco, CA, United States
- **Contract:** Temporary contract
- **Skills:** Application Programming Interfaces (APIs), Systems Engineering, Identity and Access Management, Python (Programming Language), Node.Js, Next.js, TypeScript, Tailwind, ReactJS, Indexer, Backend, Webpack, Stripe, Front End Software Development
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25303_5fb710e42e8706a9d622ca4688877017

## About the Role

* Have deep expertise with React, TypeScript, and modern frontend architectures (e.g., Next.js, Vite)
 * Think in systems, not stacks, designing flows and states that remain stable under complexity
 * Have built production auth, billing, or IAM flows with performance in mind
 * Write maintainable, performant code that improves every system it touches
 * Know how to balance clarity and speed across evolving requirements
 * Lead through quality, setting standards and mentoring others by example
 * Value developer UX, docs, onboarding, and long-term maintainability
 * Navigate ambiguity with craft, ownership, and curiosity

Bonus Points For:

 * Experience building dev-facing platforms, SDKs, or public APIs
 * Familiarity with identity (Clerk, Auth0, NextAuth) and billing systems (Stripe, Metronome, Orb)
 * Optimizing frontend systems for global, low-latency users
 * Experience with SEO metadata, structured data, and indexing

## Description

We're hiring a frontend systems engineer to shape the public and product-facing surfaces of Noumena's intelligence platform. This is a foundational role where UI isn't just presentation; it's how intelligence becomes legible, learnable, and trusted.

You'll build adaptive, real-time interfaces that sit directly atop our evolving models and runtime systems. You'll work across modeling, infrastructure, and product teams to ensure every surface you touch feels coherent, structured, and fast, even as it adapts in real time.

This isn't frontend-as-polish. It's frontend as interface logic, crafted for experts who think deeply and move quickly.

TypeScript, React, Next.js, Tailwind, Node.js. Bonus points for experience across the stack with Python or Rust and with adaptive or model-facing UI architectures.

What You'll Do

 * Architect and build production-grade UIs with real-time feedback loops
 * Lead implementation of developer-facing experiences (docs, onboarding, auth, billing)
 * Collaborate with infra and model teams to align interaction patterns with backend logic
 * Shape internal tools that support structured planning and engineering workflows