This role is for a mechanical engineer on a high-impact team at DoorDash focused on designing and developing high-performance electric motors for unmanned aerial vehicles (UAVs). The position involves significant architectural ownership and requires on-site presence in San Francisco at least three days a week. The engineer will work in a fast-paced, prototype-driven environment with access to advanced manufacturing tools. This senior role emphasizes collaboration across various engineering disciplines and offers opportunities for mentorship and increased responsibility.

• Bachelor's degree in mechanical engineering and 3+ years of experience.
• Experience with dynamic mechanical systems such as motors and actuators.
• Strong 3D modeling skills for complex parts and assemblies.
• Self-sufficient in structural and thermal simulation.
• Hands-on prototyping experience, including metal fabrication and 3D printing.
• Familiarity 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.
• Bonus points for experience with electric motor manufacturing processes and equipment.

• Collaborate closely with electro-mechanical design experts on winding and magnet design.
• Design mass and volume optimized rotor and stator structures.
• Select and design bearing systems.
• Integrate electrical wiring and connectors.
• Select and integrate motor sensors such as rotary encoders and temperature sensors.
• Perform structural and thermal finite element analysis to optimize performance and reliability.
• Take ownership of motors from concept through production.
• Build prototypes, fixtures, and test hardware using CNC tools and 3D printers.
• Design for outdoor commercial operation, ensuring ingress protection and environmental survival.