Product Engineer, Intelligence Interfaces (San Francisco)

Stealth AI Startup; San Francisco (CA); Remote; USD 150,000 - 250,000; Full time

Job summary

A leading AI research lab seeks a Product Engineer to design and implement critical user-facing systems. This role emphasizes building structured, intuitive interfaces that evolve with adaptive intelligence. Ideal candidates will have significant experience in frontend technologies, particularly React and TypeScript, and thrive in dynamic product development environments.

Benefits

Meaningful equity

Remote-flexible work environment

Travel covered for quarterly in-person gatherings

Qualifications

• Deep experience with React and TypeScript in dynamic frontend environments.
• Experience building tools for technical users in high-leverage domains.
• Ability to thrive in zero-to-one product environments.

Responsibilities

• Architect and build responsive, real-time product experiences.
• Design interfaces grounded in user judgment and model feedback.
• Prototype interaction paradigms that adapt through use.

Skills

React

TypeScript

Node.js

Python

Rust

Job description

Craft the interface where adaptive systems become legible, structured, and trusted.

About Noumena

Noumena is an AI research lab and product company building toward AGI through narrow, adaptive intelligence. We design systems that evolve through use, reflecting and amplifying the judgment of expert users. By owning the full stack, from silicon to interface, we ensure intelligence and interaction evolve in lockstep.

We’re starting with expert software developers, but the platform we’re building will adapt to experts across fields : engineering, research, planning, and beyond.

About the Role

We’re hiring a Product Engineer to lead the design and implementation of our most critical user-facing systems : interfaces where real-time model behavior becomes structured, intuitive experience.

This is not frontend-as-polish. It’s frontend as product. You’ll work closely with model, infrastructure, and design leads to build tools where adaptive intelligence becomes actionable, visible, and trusted. You’ll define how these surfaces behave, not just how they look. Our users aren’t casual, they’re experts : engineers, researchers, and high-agency builders who demand clarity and precision.

TypeScript, React, Next.js, Tailwind, Node.js. Bonus points for experience across the stack with Python or Rust, and with model-adaptive or real-time UIs.

Responsibilities

• Architect and build responsive, real-time product experiences
• Design opinionated interfaces grounded in user judgment and model feedback
• Shape UI logic that evolves with system capabilities
• Prototype and iterate interaction paradigms that adapt through use
• Define workflows that support deep users, from onboarding to power use

You May Be a Good Fit If You :

• Have deep experience with React, TypeScript, and dynamic frontend architectures
• Think in flows and system constraints, not just layout or state
• Have built structured tools for technical users or high-leverage domains
• Care about performance, clarity, and long-term architectural health
• Thrive in zero-to-one product environments and high-agency teams

Bonus Points For :

• Working across the stack (TypeScript, Python, Rust)
• Building editors, structured planning tools, or real-time UIs
• Designing for data-heavy or model-driven applications
• Engineering feedback loops between system use and behavior

Why This Role Matters

This is the surface layer of Noumena’s intelligence engine, the space where capability becomes clarity. Every interaction you shape becomes a site of adaptation, trust, and refinement. You’re not just building a product, you’re defining how usable intelligence feels.

Team & Culture

We’re a small, senior team of researchers, engineers, and builders. We value deep ownership, curiosity, and deliberate thinking. We care about coherence, from silicon to syntax, and we move with quiet urgency.

We’re remote-flexible and invest in real-world time together, especially during pivotal build phases. We’re radically deliberate : open to experimentation, allergic to drift, and committed to systems that matter.

Location & Compensation

• Remote-flexible (with travel covered for quarterly in-person gatherings)
• Open to candidates spending time in the Bay Area during key build phases
• Base salary : $150,000 – $250,000
• Includes meaningful equity : high-impact work means high ownership

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Product Intelligence • San Francisco, CA, US