Senior Mechanical Design Engineer

Bimotal specializes in designing and manufacturing ultra-compact, high-torque motor systems for electric mobility, robotics, and health. We are a team of Tesla, startup, and aerospace industry alumni working toward a shared mission to elevate human capability. Our integrated powertrain solutions offer outstanding torque density, efficient design, and scalable performance with fully integrated controls and software. We are positioning ourselves to build the best small motor systems in the world.

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As a Sr. Mechanical Design Engineer at Bimotal, you will own components and subassemblies of electric powertrains through their complete product lifecycle. Your responsibilities will span from hand calculations and concept design through FEA, prototyping, testing, optimization, DFM, production ramp, and long-term reliability improvements—including field issue resolution and service reduction strategies. If you are excited to take ownership of projects with real stakes, work independently, and tackle unfamiliar and challenging problems to build world‑class electric powertrains we would love to hear from you.

• Design of hardware, test fixtures, production tools, and assembly fixtures
• Spreadsheet calculations, system architecture, CAD design, FEA, rapid prototyping, and optimization with fast design iterations; PLM/PDM lifecycle management; NPI line management and prototype assembly; manufacturing support; supplier management
• Design for manufacturability, testability, reliability, and serviceability
• Supply chain collaboration, including communication and technical discussions with suppliers
• Support production ramp by root causing mechanical issues, improving processes, designing fixtures, and more

• Expert with CAD packages; strong physics background with extensive mechanical engineering expertise and a passion for detail and deep work
• Experience taking products from concept to high-volume production
• Excellent reading, writing, and verbal communication skills
• Extremely motivated and excited to take on major responsibility at an early‑stage startup
• Experience in the creation and operation of test equipment
• Preferred – experience with the design and simulation of gearbox components and assemblies
• Preferred – strong skills in CFD, thermal, and mechanical simulation
• Preferred – electrical knowledge and understanding; ability to read schematics, interpret circuit board layout traces and PCBA designs, and understand how they translate into the mechanical domain

• Salary Range: $120k - $160k
• Commensurate equity packages with experience
• Flexible PTO
• Health insurance stipend & 401k plan
• Lunch in‑office
• 4 days in office at beautiful Berkeley, CA