AI Code Tool Developer

Build the world’s most thoughtful AI coding assistant — and rethink how intelligence helps people write software.

About Noumena

Noumena is building a vertically integrated intelligence platform — from the system of models and inference layer all the way up to beautifully crafted, high-performance user interfaces.

Our mission is to create AI-native tools that go far beyond today’s generic assistants — tools purpose-built for real work, deeply optimized across the stack, and obsessively focused on user experience.

We’re still in stealth, but our team brings experience from frontier AI research and product engineering, with a track record of building and scaling impactful systems and companies. We’re backed by leading investors and preparing for a public launch this summer.

About the Role

We’re hiring a Developer to help build Noumena Coder — our AI-native coding assistant.

This isn’t just an AI assistant — it’s a rethink of what developer tools can be when you own the full intelligence layer beneath them.

Because we’re not built on third-party APIs, we’re free to experiment with capabilities and interactions that would be impossible elsewhere

Responsibilities

Help design and build core features of Noumena Coder

Implement high-performance UX flows for PR planning, refactoring, etc.

Collaborate with model, infra, and product to expose novel capabilities

Prototype interaction modes that reflect real developer workflows

Shape the dev-facing experience from concept to production

You May Be a Good Fit If You:

Have built IDE-like tools, dev environments, or productivity apps

Understand developer mental models and enjoy smoothing edge cases

Can work full-stack (frontend-heavy), especially when shaping new APIs

Have worked with LLMs or intelligent agents, or want to go deep

Care about delivering fluid, “I can’t go back” user experiences

Strong Candidates May Also Have Experience With:

VS Code extensions, REPLs, or live development tooling

Prompt engineering or agent orchestration

Syntax-aware interactions (ASTs, multi-step planning, etc.)

Dev workflows (branching, staging, PR reviews, CI triggers)

Multi-agent systems or structured generation interfaces

Why This Role Matters

You’re designing the interface where human creativity meets machine reasoning. If we get this right, it won’t just autocomplete code — it will change how people think about programming.

Team & Culture

We’re a small, senior team that values autonomy, sharp thinking, and low-ego collaboration. We’re remote-flexible but value time together, especially for product shaping and launches. We care deeply about craft and performance — and we hire people who want to build enduring systems that feel great to use.