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Founding Engineer UX Design at Cua - 0-3 years, San Francisco, CA, US, undefined

Overview

Cua is building the infrastructure that enables general-purpose AI agents to safely and scalably use real computers and applications. We’re a small team backed by Y Combinator and top-tier investors, and our open-source tools are already used by thousands of developers. As a Founding Engineer, UX & Design, you’ll own how developers experience Cua - shaping everything from product flows and dashboards to the open-source contributions developers see every day. We’re looking for someone who blends strong frontend engineering skills with a sharp design sense. You’ll collaborate with the founding team to turn complex infrastructure into intuitive, delightful developer experiences, defining the look, feel, and usability of our product. Your work will define how the next generation of AI agents is built, debugged, and deployed by thousands of developers worldwide.

Responsibilities

Own the UI/UX across the Cua platform - from developer onboarding flows to dashboards and tools for managing agent environments.
Build and maintain frontend systems (Next.js, Tailwind, shadcn/ui or similar) and work closely with backend engineers to integrate APIs.
Translate complex infrastructure into simple, usable product experiences for developers.
Collaborate with open-source contributors and early users to refine product usability and design.
Contribute to docs, guides, and visual materials that help grow the ecosystem.
Participate in product discussions, drive the user-facing roadmap, and help shape long-term product vision.

Qualifications

Required:

2+ years of frontend or full-stack engineering experience.
Strong design sensibility and ability to craft intuitive user interfaces.
Proficiency in TypeScript/React (Next.js preferred) and modern frontend libraries (Tailwind, shadcn/ui, etc.).
Experience turning product requirements into polished user experiences.
Comfortable designing in Figma and translating designs into production code.
Excited about open-source, developer tools, and working in a fast-moving startup environment.

Preferred:

Experience contributing to open-source projects.
Strong visual/interaction design portfolio or past work examples.
Familiarity with developer tools or infrastructure products.
Interest in AI/ML, agents, or developer-facing AI workflows.
Based in or willing to relocate to SF

What We Offer

Early-stage ownership - Join as a founding engineer with equity and high influence.
Real traction - 9k+ GitHub stars and a fast-growing developer community.
Product ownership - Full scope over design, frontend, and UX decisions.
Impact - Define the developer experience for the next wave of AI infrastructure.

How to Apply

Please include:

Your portfolio, Dribbble, or GitHub (required).
A short note on the most impactful UI/UX or product experience you’ve designed. Bonus: try building something with Cua or suggest UX improvements - we notice contributors. The base salary range for this role in San Francisco is $100,000–$150,000 USD per year, depending on experience and skill level. This role also includes equity and other benefits.

Founding Engineer UX Design

Cua

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