Senior Mechanical Design Engineer — Electric Motors

About the role

This is an exploratory product space with significant opportunity for architectural ownership. This role is on-site in San Francisco’s mission district at least 3 days per week. Availability to be onsite 5 days per week is required with flexibility to work from home as appropriate. Occasional travel to suppliers is expected. You will operate in a very fast-paced, prototype-driven environment where hands-on engineering and rapid iteration are encouraged. We provide access to a full machine shop with welding equipment, additive manufacturing tools, electrical integration tools, and significant in-house test capability to enable efficient concept-to-hardware development. This is a senior role that offers autonomy, cross-functional collaboration, mentoring, and opportunities for increasing responsibility.

Responsibilities

• Collaborate closely with:
• Electro-mechanical design experts on winding and magnet design.
• Internal, domestic and foreign manufacturing partners
• Electrical, systems, structural, aerodynamics, reliability, and test engineers as well as industrial design to refine requirements.
• Design 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.)
• Perform structural and thermal finite element analysis (FEA) to optimize performance and reliability.
• Start to finish ownership of motors from concept through production.
• Build prototypes, fixtures, and test hardware using CNC tools and 3D printers.
• Design for outdoor commercial operation including ingress protection and harsh environmental survival.

Requirements

• Mechanical engineering bachelors degree and 3+ years of experience.
• 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, 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.

Qualifications

• Bonus points for experience with electric motor manufacturing processes and equipment.

Skills

• Strong understanding of electromechanical systems.
• Proficiency in CAD software.
• Experience with FEA and thermal simulations.
• Hands-on experience with prototyping and manufacturing.
• Ability to work independently and collaboratively.

Benefits

Compensation for this role includes opportunities for equity grants. Talk to your recruiter for more information.

We offer a comprehensive benefits package to all regular employees, which includes a 401(k) plan with employer matching, 16 weeks of paid parental leave, wellness benefits, commuter benefits match, paid time off and paid sick leave in compliance with applicable laws (e.g. Colorado Healthy Families and Workplaces Act). DoorDash also offers medical, dental, and vision benefits, 11 paid holidays, disability and basic life insurance, family-forming assistance, and a mental health program, among others.

To learn more about our benefits, visit our careers page here.

See below for paid time off details:

• For salaried roles: flexible paid time off/vacation, plus 80 hours of paid sick time per year.
• For hourly roles: vacation accrued at about 1 hour for every 25.97 hours worked (e.g. about 6.7 hours/month if working 40 hours/week; about 3.4 hours/month if working 20 hours/week), and paid sick time accrued at 1 hour for every 30 hours worked (e.g. about 5.8 hours/month if working 40 hours/week; about 2.9 hours/month if working 20 hours/week).

Pay

I4 $109,500 - $161,000 USD I5 $134,000 - $197,000 USD I6 $161,800 - $238,000 USD

About DoorDash

At DoorDash, our mission to empower local economies shapes how our team members move quickly, learn, and reiterate in order to make impactful decisions that display empathy for our range of users—from Dashers to merchant partners to consumers. We are a technology and logistics company that started by enabling door-to-door delivery, and we are looking for team members who can help us go from a company that is known as the place you order food to a company that people turn to for any and all goods.

DoorDash Commitment to Diversity and Inclusion

We’re committed to growing and empowering a more inclusive community within our company, industry, and cities. That’s why we hire and cultivate diverse teams of people from all backgrounds, experiences, and perspectives. We believe that true innovation happens when everyone has room at the table and the tools, resources, and opportunity to excel.

Statement of Non-Discrimination

In keeping with our beliefs and goals, no employee or applicant will face discrimination or harassment based on: race, color, ancestry, national origin, religion, age, gender, marital/domestic partner status, sexual orientation, gender identity or expression, disability status, or veteran status. Above and beyond discrimination and harassment based on “protected categories,” we also strive to prevent other subtler forms of inappropriate behavior (i.e., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at DoorDash. We value a diverse workforce – people who identify as women, non-binary or gender non-conforming, LGBTQIA+, American Indian or Native Alaskan, Black or African American, Hispanic or Latinx, Native Hawaiian or Other Pacific Islander, differently-abled, caretakers and parents, and veterans are strongly encouraged to apply. Thank you to the Level Playing Field Institute for this statement of non-discrimination.

Notice to Applicants for Jobs Located in NYC or Remote Jobs Associated With Office in NYC Only

We used Covey as part of our hiring and/or promotional process for jobs in NYC and certain features may qualify it as an AEDT in NYC. As part of the hiring and/or promotion process, we provided Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound from August 21, 2023, through December 21, 2023. We resumed using Covey Scout for Inbound again on June 29, 2024, and ceased using Covey Scout for Inbound on April 30, 2026.

Notice to Applicants for Jobs Located in NYC or Remote Jobs Associated With Office in NYC Only

The Covey tool has been reviewed by an independent auditor. Results of the audit may be viewed here: https://getcovey.com/nyc-local-law-144.