Senior Mechanical Design Engineer - Delivery Drone Electric Motor

Senior Mechanical Design Engineer - Delivery Drone Electric Motor San Francisco, CA (you can work from home up to 2x/week) The team builds small, lightweight autonomous delivery drones with safety-first hardware designed to operate around people and everyday urban infrastructure. The work has a positive impact on the sustainability, access, and cost of everyday necessities. You would be joining an elite group of about 60 people and 20 engineers inside a much larger public company. This org operates as a small, fast-moving hardware innovation lab: minimal bureaucracy, real build/test cycles, and ownership of systems that ship and operate at a very large scale. The company is targeting a salary range of $200k, plus RSUs translating into total first year compensation of roughly $300k. Job Responsibilities 50% of the job will be designing motors, 50% of the job will be electric motor manufacturing development. 20% of the time will involve travel to suppliers. Collaborating closely with electro‑mechanical design experts on winding and magnet design. Collaborating closely with internal, domestic and foreign manufacturing partners. Collaborating closely with electrical, systems, structural, aerodynamics, reliability, and test engineers as well as industrial design to refine requirements. Designing mass and volume optimized rotor and stator structures. Bearing selection and bearing system design. Electrical wiring and connector selection and integration. Motor sensor selection and integration (rotary encoders, temperature, etc.). Performing structural and thermal finite element analysis (FEA) to optimize performance and reliability. Starting to finish ownership of motors from concept through production. Building prototypes, fixtures, and testing hardware using CNC tools and 3D printers. Designing for outdoor commercial operation including ingress protection and harsh environmental survival. Qualifications A bachelor's degree in mechanical engineering. At least 3 (ideally 5-10) years of professional experience as a mechanical engineer. Experience with dynamic mechanical systems (motors, actuators, mechanisms, etc.). Strong 3D modeling (CAD) skills for complex parts and assemblies. Self sufficient with at least basic structural and thermal simulation. Self sufficient with hands‑on prototyping, metal fabrication, and 3D printing. Competence with assembly and test fixture design. Familiar with electromechanical integration and wiring practices. Experience designing hardware for outdoor or harsh environments. Strong understanding of manufacturability and assembly methods. Comfortable working in an exploratory, fast‑paced environment. Experience creating 2d drawing using ASME Y14.5 geometric dimensioning and tolerancing (GD&T). #J-18808-Ljbffr