Founding Engineer

We are looking for one cracked founding engineer to build the AI that plans large residential buildings end to end: the agent harness, the data and context layer, and the evals. You work in a small, high-agency team on real projects that ship right away., * Harness engineering: You build and run the layer around the model end to end: memory, tool orchestration, verification, drawing and document generation, so the output stays consistent and code-compliant at scale.

• Data and context: You turn messy planning data (CAD/BIM models, PDFs, site surveys, building codes) into the right context at every phase, always traceable back to its source.
• Evals and benchmarks: You build the eval harness (datasets, regression tests) and measure our agents against the architectural rule sets and judgment calls.
• BIM and IFC automation: You connect to the architect’s toolchain (Revit, ArchiCAD, IFC) to drive automated modeling and clean interoperability.

• Hands-on experience with harness engineering: agents, tool orchestration, evals.
• High agency and an entrepreneurial drive. Ideally you have founded before or want to. You find the work yourself and move fast.

• Experience in a high-growth environment (startup, scale-up or similar).

• Nice to have: German, Revit, IFC or Grasshopper, a non-linear CV and experiments with reinforcement learning (MCTS, GRPO, RLHF) or diffusion models (discrete and continuous).

• Competitive salary and a stake in the company, with first-hire upside
• Real projects that ship right away
• You build right alongside the founders, in the same codebase on the same hard problems
• Wellpass and unlimited coffee from a professional barista

We’re a small team with an extremely high bar. If you want to work deeply on hard problems and change the way construction planning is done, you’re the one we need.

1zu100 is automating construction planning. Together with exceptional architecture firms, we plan multi-unit residential buildings and deliver completed, permitted plans as a service.