Senior Actuator Design Engineer

Figure is an AI robotics company developing autonomous general-purpose humanoid robots. The goal of the company is to ship humanoid robots with human level intelligence. Its robots are engineered to perform a variety of tasks in the home and commercial markets. Figure is headquartered in San Jose, CA. We are seeking a passionate and skilled Actuator Design Engineer with a strong background in electric motor mechanical design and integrated geartrain development. You will help define and execute the design of compact, high-torque, and highly efficient actuators for a new generation of humanoid robots. The ideal candidate has hands-on experience in rotor/stator design, geartrain sizing (planetary, harmonic), and bearing arrangement, and is proficient with tools like CATIA and KISSsoft or Romax. Key Responsibilities: • Own the mechanical design of electric actuators, including lamination stacks, high-speed rotors, geartrains, and bearing systems • Design and size planetary gearboxes and other reduction stages to meet torque density, speed, and lifetime requirements • Architect full actuator assemblies including structural layout, thermal path considerations, and serviceability • Lead design of rotor and stator assemblies including magnet retention (adhesives, interference fits), balancing, and burst strength analysis • Perform detailed tolerance stack-ups, shaft fits, bearing life calculations, and structural analysis using FEA • Use KISSsoft or Romax to model gearbox performance, lifetime, and manufacturability • Develop detailed CAD in CATIA and release complete drawing packages for supplier release and internal manufacturing • Collaborate closely with electromagnetic, controls, and system teams to deliver integrated, validated actuator solutions • Support vendor discussions and DFM reviews to ensure robust and scalable production of actuator components Requirements: • Bachelor’s degree in Mechanical Engineering • 3+ years of experience in mechanical design of actuators, electric motors, or gear-driven systems • Strong fundamentals in mechanical design, dynamics, and structural analysis • Proven experience designing planetary or other compact gearbox architectures • Deep understanding of bearing selection, preloading, and life estimation • Proficiency with CATIA (V5 or V6) for complex assemblies and surfacing • Hands-on experience with rotor balancing and high-speed design for rotating systems • Proficient with KISSsoft or Romax for gearbox modeling and optimization • Excellent communication skills and ability to thrive in a fast-paced, cross-functional environment Preferred Qualifications: • Master’s degree in Mechanical Engineering with a focus on machine design or dynamics • Experience designing actuators for robotics, aerospace, or automotive applications • Knowledge of thermal management in compact electromechanical systems • Familiarity with lamination stack-up design, magnet bonding, and motor assembly methods • Experience taking actuator designs from concept through prototyping and into production The US base salary range for this full-time position is between $150,000 and $190,000 annually. The pay offered for this position may vary based on several individual factors, including job-related knowledge, skills, and experience. The total compensation package may also include additional components/benefits depending on the specific role. This information will be shared if an employment offer is extended.