Relling Systems (YC S25) builds ready-to-deploy AI robot workcells for US manufacturers. We design and test in San Francisco and put systems to work on factory floors. This role is in person in Potrero Hill, San Francisco.
What you'll doDesign, build and test fixtures, end effectors and electromechanical assemblies for robot workcells.
Choose sensors and actuators, manage interfaces and check tolerances against real parts.
Use test results to improve reliability and document build and service steps.
A hands-on mechanical, electrical or mechatronics project with clear personal ownership.
CAD, drawings and basic tolerance reasoning; comfort building and testing your design.
Formula SAE, Formula Electric, machine-shop or robotics team experience is useful; equivalent projects count.
Apply with your resume and a short description of something you built. Project links are optional. Tell us what you owned, what failed and how you tested the fix. Coursework, student teams and personal projects count.
Skills Required
- Hands-on mechanical, electrical, or mechatronics project with clear personal ownership
- Experience with CAD, drawings, and basic tolerance reasoning
- Comfort building and testing designs
- Formula SAE, Formula Electric, machine-shop, or robotics team experience
- Equivalent personal or academic projects
What We Do
Relling builds and deploys turnkey, AI-native robot workcells for American manufacturers, targeting high-mix, contact-rich production tasks that conventional automation struggles to handle. Its systems automate assembly, machine tending, finishing, kitting, welding, and inspection—work that classical automation cannot economically handle. Cells are scoped and qualified off-site, then run on US factory floors in weeks, bringing physical AI into practical manufacturing operations.
