Software Engineer (TypeScript / Python)

About the role

sizeless builds the data layer for the infrastructure under streets: a construction crew records an open trench with a phone, and the system turns it into a 3D model, recognises what is underground and produces CAD, BIM, GIS and quantity documentation. It is a small technical team founded out of ETH Zürich, looking for engineers to build the systems that make this work in production.

Key responsibilities

• Build the product used by customers: the capture app in the field and the workspace where results are delivered.
• Work across the stack: web, mobile, backend and the data pipelines behind them.
• Keep the processing side reliable: long-running jobs, large files and lots of 3D data moving between systems.
• Build the internal tooling the rest of the team depends on.

Required profile

• Solid engineering fundamentals in TypeScript, Python or a comparable language.
• Comfortable moving between product code and infrastructure.
• Real leverage from AI-assisted development, whatever your setup.
• Ownership: you take problems personally and see them through.
• Full working proficiency in English; German is a plus, not required.
• Experience with 3D data, mobile apps or geospatial systems is welcome but not required; quick learning and attention to detail matter more.

What we offer

• Early team member with real ownership, working on products shipped to paying customers.
• Employee stock options.
• New office in Zurich, district 5.
• Modern, AI-first toolchain.
• Direct collaboration with the founders.