Senior Mechanical Engineer (Actuators)

Foundation • San Francisco, CA

1d

About The Position

Join a small, high-impact team building the next generation of rotary actuators that will power every degree of freedom in our humanoid robots. You'll own the mechanical design of high-performance electromechanical systems, pushing the limits of torque density, efficiency, manufacturability, reliability, and packaging. This role spans the entire product lifecycle—from concept generation and rapid prototyping through testing, validation, and production—giving you end-to-end ownership of the hardware you create. You'll work alongside experts in electrical engineering, motor design, controls, embedded systems, and manufacturing to develop tightly integrated actuator systems where every gram, millimeter, and watt matters. As our actuator organization grows, you'll have the opportunity to help define new architectures, influence technical direction, and shape the future of one of the most critical technologies in humanoid robotics.

Requirements

• 3+ years design experience, with a preference for high precision mechanism assemblies and or rotational assemblies (gears, motors, etc).
• Degree in Mechanical Engineering, Mechatronics or a related field.
• Strong fundamentals in statics, dynamics and controls, electromagnetism, and other related studies.
• Experience with thermal analysis, FEA, and 3D CAD programs in a professional environment.
• Familiarity with various electric motor, motor driver, gear reduction mechanisms, and motion control technologies.
• Hands-on fabrication and prototyping experience.
• Experience in reliability testing, failure analysis, and potential implementation of design changes in production environments.

Responsibilities

• Own the mechanical design of high-performance electromechanical systems, pushing the limits of torque density, efficiency, manufacturability, reliability, and packaging.
• Span the entire product lifecycle—from concept generation and rapid prototyping through testing, validation, and production.
• Work alongside experts in electrical engineering, motor design, controls, embedded systems, and manufacturing to develop tightly integrated actuator systems.
• Help define new architectures, influence technical direction, and shape the future of one of the most critical technologies in humanoid robotics.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior