# Mechanical Design Engineer - Robot Parts & Enclosures (Contract) at OS3

- Company: OS3 (YC S26)
- What the company does: Affordable, intelligent humanoid robots built to deploy at scale. Backed by Y Combinator.
- Company website: https://os3robotics.com/
- Type: Startups (AI role)
- Level: Mid level
- Location: San Francisco, CA, US / Remote (IN)
- Work setup: Remote
- Pay: $360K to $800K base salary per year (USD)
- Posted: 2026-07-24
- Apply by: 2026-10-08
- Apply: https://www.ycombinator.com/companies/os3/jobs/r2aKeWa-mechanical-design-engineer-robot-parts-enclosures-contract
- Page: https://www.1752.vc/careers/jobs/os3-mechanical-design-engineer-robot-parts-and-enclosures-contract/

## About the role

We design and build our robots in-house, from structural parts to exterior covers, and iterate on them continuously as the robots run in the real world. You'll own the CAD design of robot parts and enclosures — working remotely, with your designs printed, machined, and tested on real robots in our San Francisco lab.

## What they're looking for

- Strong CAD fundamentals — parametric modeling, assemblies, tolerancing, DFM
- Hands-on prototyping experience: you've printed, machined, assembled, and fixed your own designs
- A feel for designing around electronics, cabling, and moving joints
- Clear async communication — you can drive a design loop remotely
- Nice to have:
- Experience with robot arms, grippers, or mobile platforms

Tags: Engineering