Make something people want. Backed by AI Grant.
About the role
Design compelling, clear UI/UX and produce high-quality mocks that demonstrate strong product taste. Turn design mocks (yours or others’) into pixel-perfect , production-ready frontends using modern web tech.
What they're looking for
- Strong UX and visual design skills with proven taste and craftsmanship
- Frontend engineering experience — comfort building real UI in React, TypeScript, and modern CSS
- Ability to move fluidly between design tools (Figma, etc.) and frontend code
- A “get things done” mindset: you ship quickly, iterate based on feedback, and take ownership
- Someone who cares deeply about polish — from typography and spacing to micro-interactions and transitions
- Comfort with ambiguity: you’ll often define your own scope and drive things forward with little direction
More about this role
Y Combinator builds the software that runs YC — internal tools used by partners and founders, public products used by the broader startup ecosystem, and AI-powered systems that automate complex workflows. Our team is small, the impact is large, and we ship real product to real users frequently.
We’re looking for a Software Product Design Engineer — someone who lives at the intersection of design and engineering. You’ll design beautiful user experiences, translate high-fidelity mocks into production code, and proactively elevate existing interfaces with thoughtful detail and interactions.
Design compelling, clear UI/UX and produce high-quality mocks that demonstrate strong product taste.
Turn design mocks (yours or others’) into pixel-perfect , production-ready frontends using modern web tech.
Iterate on existing interfaces by improving layout, interaction quality, motion, and design consistency.
Work closely with engineers, partners, and stakeholders — you’ll own the design and implementation of features end-to-end.
Rapidly prototype and “vibe code” to explore ideas, gather feedback, and iterate quickly.
Contribute to design systems, component libraries, and patterns that raise...
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