Member of Technical Staff - Product Design Engineer

Introducing Moonlake, AI for creating world simulations. About Moonlake Moonlake is building the frontier of interactive world models: systems that generate, simulate, and reason over 3D environments for robotics, embodied AI, simulation, gaming, and multimodal agents. We are developing AI-native tooling for creating dynamic worlds where geometry, physics, visuals, audio, and interaction remain coherent in real time. Our team sits at the intersection of:Embodied AIRobotics simulationInteractive 3D worldsWorld modelsReal-time generationAI infrastructure The Role We'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 experiencesBuild them directly in codePrototype quicklyThink deeply about interaction designShip performant interfaces for highly technical systems The ideal candidate is a hybrid between:Product engineerFrontend engineerInteraction designerCreative technologist What You'll DoDesign and build interactive product experiences end-to-endOwn both frontend UX and supporting backend infrastructure where neededCreate intuitive interfaces for highly technical AI and 3D workflowsBuild real-time tools for world creation, simulation, and interactionCollaborate closely with research and engineering teams working on world models and embodied AI systemsPrototype rapidly using modern AI-assisted coding workflowsImprove performance, responsiveness, and usability across complex interfacesHelp define the visual and interaction quality bar for Moonlake products What We're Looking ForStrong 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 engineeringExperience building polished, production-grade interfacesStrong understanding of responsive, real-time web applicationsAbility to prototype quickly and iterate independentlyComfort owning products from concept through implementationStrong visual taste and attention to detail Technical Experience We ValueReact / Next.js / TypeScriptReal-time rendering and interactive UI systemsWebGL, Three.js, or similar 3D web frameworksPerformance optimization for complex interfacesBackend infrastructure for collaborative or real-time systemsAI-native product workflowsSystems architecture for interactive tools Bonus PointsExperience with game engines, 3D tools, or creative softwareFamiliarity with Blender, world-building tools, or simulation systemsExperience designing interfaces for AI products or developer toolsBackground in graphics, creative coding, or interactive mediaExperience with collaborative editing systems or multiplayer architecturesInterest in embodied AI, world models, robotics, or simulation Why This Role Matters Moonlake is building tools that sit between:AI systems and human creativitySimulation and interactionResearch 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