(Senior) Full-Stack Engineer (AI-Assisted 3D / CAD / BIM Development) // 20° GmbH
- Decomposition & specification: turning hard, fuzzy problems into clean specs an AI agent can execute, in the right-sized steps.
- Review & verification: reading AI-generated code critically, especially algorithmic and numerical code, and proving to yourself it's correct (test design, edge cases, visual/geometric validation) rather than trusting it right away.
- Steering & taste: keeping an AI-built codebase coherent: enforcing our architecture conventions, catching plausible-but-wrong solutions, and knowing when to stop the agent and think.
- Extend the 3D/CAD editor: new element types (windows/openings, rooms, zones, HVAC), multi-storey support, richer editing tools.
- Build out real-time multi-user collaboration
- Improve and verify the geometry engine and the IFC / CAD exporters: reconstruction quality, normalization, export fidelity.
- Own features across the full slice: Postgres schema → NestJS domain → REST/WS API → React/Three.js UI.
- High quality standards: while moving fast, you still care deeply about code quality and architectural soundness of the product.
- Fluency with AI-assisted / agentic development: hands-on experience driving tools like Claude Code to build real, non-trivial features, plus the discipline to review and verify their output rigorously.
- Strong 3D graphics engineering with Three.js / WebGL: scene, camera & projection math, raycasting/picking, mesh/BufferGeometry processing, render-loop performance.
- Fluency in React + TypeScript
- Backend competence in Node/TypeScript + relational SQL: NestJS or similar, PostgreSQL, transactions, concurrency.
- Mathematical & geometric literacy: enough to understand theoretical concepts, read algorithmic code and research papers.
- Product-minded and comfortable owning an under-documented, reverse-engineered problem space.
- BIM / CAD domain knowledge: IFC schema & STEP, architectural concepts (storeys, slabs, wall construction).
- Geospatial / GIS: UTM/EPSG zones, GeoJSON, coordinate transforms.
- Computer Vision: classical CV, deep learning segmentation.
- Building physics: heat transfer, thermal bridging, U-values, hygrothermal behavior.
- Real-time collaborative editing: optimistic concurrency, CRDT-adjacent sync, undo/redo, WebSocket reconciliation.
- German language skills C1+.
- Small and ambitious team, high ownership, a genuinely hard problem and a rare chance to do serious work at the pace AI-assisted development makes possible.
- We're already an AI-first team: the tooling, conventions, and dense in-code documentation are built around that workflow, so you'll be productive in a deep domain far faster than the domain would normally allow.
Skills
- ai
- sql
- nestjs
- supabase
- typescript
- element
- react
- opencv
- claude
- node
- postgresql
- vite
- postgres
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