Software Product Design Engineer, Y Combinator

• 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

Desirable

• 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 the bar for frontend quality across YC
• Stay close to users: talk to them, watch how they use the product, and improve the experience based on real signals
• This is a unique opportunity to combine design taste, frontend craftsmanship, and real product impact in a role with broad autonomy and high visibility