3D Web Platform Engineer

Spatial Support is hiring a Realtime 3D Web Platform Engineer to make our browser-based 3D showroom feel instant and alive. You’ll work in SvelteKit + Threlte/Three.js, pushing WebGL—and piloting WebGPU—to deliver 60+ FPS visuals while streaming AI guidance in real time. You’ll ship features like explode views, instant highlights, and conversational UI, backed by websockets and an auth-first architecture. You obsess over profiling, asset pipelines, and code quality, and you’re fluent in TypeScript and modern frontend patterns. Strong WebGL experience required; WebGPU, game/CAD/AR work, and OSS contributions are a plus. Remote-first, APAC-friendly.

We fuse AI with high-fidelity 3D so customers can explore complex products in the browser and chat with a scene-aware assistant that “sees” the model.

Own the interactive 3D web experience in SvelteKit + Threlte. Ship a streaming-first, immersive UI that blends our 3D viewer with an AI chat surface so they feel like one product. Hunt down performance bottlenecks (target 60+ FPS where possible), prototype with WebGPU alongside WebGL, and apply an auth-first approach across rich client features.

• Build features in SvelteKit/Threlte/Three.js: 3D explore (pan/zoom/orbit/exploded views), annotations, part selection/highlights.

• Optimize rendering: progressive/lazy loading, GLTF/GLB pipelines (Draco/meshopt/KTX2), offscreen work (Web Workers/OffscreenCanvas), frame budget discipline.

• Integrate real-time streams: WebSockets/SSE to sync LLM tokens + scene highlights; keep UI state consistent and snappy.

• Front-end security: auth/session handling, token hygiene, CSP/CORS, guard model access and signed asset URLs.

• UX collaboration: design intuitive 3D controls and a chat surface that reinforces visual context; usability testing/telemetry.

• Quality & observability: refactors where needed, documentation for 3D math/shaders, tests for critical logic, runtime error/perf tracking.

• 3+ years building rich web apps in TypeScript; Svelte/SvelteKit ideal (React/Vue + willingness to learn Svelte okay).

• Strong WebGL/Three.js experience; solid with transforms, materials, lighting, and debugging graphics issues.

• Proven performance optimization on the web (profilers, frame timing, asset pipelines).

• Real-time UI: WebSockets/SSE or similar; confident with async state updates.

• Front-end security basics: API key safety, XSS avoidance, CSP, CORS, session flows in SSR/SPA contexts.

• Clear communication in remote, async teams.

• WebGPU/WGSL experimentation or porting experience.

• 3D-heavy apps (games, CAD/BIM viewers, AR/VR).

• OSS contributions (Svelte/Threlte/Three.js) or reusable components.

• UX instincts and Figma comfort.

• Streaming protocols or multi-user collab (WebRTC/OT/CRDTs).

• Light backend/SSR routing skills in SvelteKit.

• Live demos that wow (share them!).

• Concrete performance wins (e.g., shader refactor → big FPS gains).

• T-shaped: deep in 3D + broad web fundamentals.

• Great docs/blogs/talks teaching others.

• Obvious excitement for AI × 3D.