Mechanical engineer jobs in California

About the role

We're looking for a Senior Mechanical Engineer to own the mobile base of our humanoid robot platform.

What you'll bring

• BS in Mechanical Engineering or a closely related field
• 5+ years of experience in mechanical design of mobile robots, vehicles, or complex electromechanical products
• Demonstrated experience with drivetrain design — wheels, motors, gearboxes, and brakes — including sizing actuators against dynamic requirements and integrating them into tight packages
• Track record of working directly with vendors on custom or semi-custom components: driving specifications, evaluating quotes, and managing qualification
• Experience designing battery packs, battery interfaces, or other user-serviceable electromechanical modules with attention to ergonomics and cycle life
• Experience packaging electronics with real thermal constraints, and validating thermal performance through analysis and test
• Working knowledge of ingress protection design and testing — sealing strategies, gasket design, and IP rating validation
• Expert-level proficiency with CAD software (Catia, SolidWorks, Fusion 360, Onshape, or similar) for complex part and assembly design
• Comfort working hands-on with hardware: building prototypes, running tests, and troubleshooting physical systems
• Strong communication skills and the ability to drive requirements to closure across mechanical, electrical, software, and design disciplines
• Experience designing suspension systems for mobile robots, AGVs/AMRs, or small vehicles
• Experience with custom wheel development — tread compounds, hub design, and durability testing