The RoleWe're looking for a
Product Design Engineer who combines strong engineering ability with exceptional product and design intuition.
This is not a traditional product designer role focused purely on Figma or static prototypes. We want someone who can:
- Design elegant user experiences
- Build them directly in code
- Prototype quickly
- Think deeply about interaction design
- Ship performant interfaces for highly technical systems
The ideal candidate is a hybrid between:
- Product engineer
- Frontend engineer
- Interaction designer
- Creative technologist
What You'll Do- Design and build interactive product experiences end-to-end
- Own both frontend UX and supporting backend infrastructure where needed
- Create intuitive interfaces for highly technical AI and 3D workflows
- Build real-time tools for world creation, simulation, and interaction
- Collaborate closely with research and engineering teams working on world models and embodied AI systems
- Prototype rapidly using modern AI-assisted coding workflows
- Improve performance, responsiveness, and usability across complex interfaces
- Help define the visual and interaction quality bar for Moonlake products
What We're Looking For- Strong engineering skills (Next.js/React, Tailwind/shadcn, edge/serverless (Vercel/Cloudflare), tRPC/GraphQL, file & data sync, and authentication)
- Strong product taste; rapid prototyping; zero-to-one ownership.
- Ability to move fluidly between UX thinking and systems engineering
- Experience building polished, production-grade interfaces
- Strong understanding of responsive, real-time web applications
- Ability to prototype quickly and iterate independently
- Comfort owning products from concept through implementation
- Strong visual taste and attention to detail
Technical Experience We Value- React / Next.js / TypeScript
- Real-time rendering and interactive UI systems
- WebGL, Three.js, or similar 3D web frameworks
- Performance optimization for complex interfaces
- Backend infrastructure for collaborative or real-time systems
- AI-native product workflows
- Systems architecture for interactive tools
Bonus Points- Experience with game engines, 3D tools, or creative software
- Familiarity with Blender, world-building tools, or simulation systems
- Experience designing interfaces for AI products or developer tools
- Background in graphics, creative coding, or interactive media
- Experience with collaborative editing systems or multiplayer architectures
- Interest in embodied AI, world models, robotics, or simulation
Why This Role MattersMoonlake is building tools that sit between:
- AI systems and human creativity
- Simulation and interaction
- Research infrastructure and product experience
The interface layer is critical. These products must make highly complex systems feel intuitive, responsive, and powerful.
You'll help define how people interact with the next generation of world-building and embodied AI tools.
We are committed to being an on-site, in-person team currently based in San Mateo
