Senior Mechanical Engineer; Actuators

Our mission is to create advanced robots that can operate in complex environments, reducing human risk in conflict zones and enhancing efficiency in labor-intensive industries.

We are on the lookout for extraordinary engineers and scientists to join our team. Your previous experience in robotics isn't a prerequisite — it's your talent and determination that truly count.

We expect that many of our team members will bring diverse perspectives from various industries and fields. We are looking for individuals with a proven record of exceptional ability and a history of creating things that work.

We like to be frank and honest about who we are, so that people can decide for themselves if this is a culture they resonate with. Please read more about our culture here (Use the "Apply for this Job" box below). .

• You like working in person with a team in San Francisco.
• You deeply believe that this is the most important mission for humanity and needs to happen yesterday.
• You are highly technical - regardless of the role you are in. We are building technology; you need to understand technology well.
• You care about aesthetics and design inside out. If it's not the best product ever, it bothers you, and you need to “fix” it.
• You don't need someone to motivate you; you get things done.

• 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.

• 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