Mechanical Engineer - Lighting & Audio Systems

DoorDash USA•Oakland, CA

1d•Remote

About The Position

We’re looking for a highly capable Mechanical Engineer to own the design and integration of lighting and audio systems for our autonomous delivery robot, DOT. This role requires a balance of strong mechanical fundamentals, system-level thinking, and an eye for human-robot interaction. You will lead the development of DOT’s interactive lighting systems—ranging from expressive “eyeballs” to headlights and taillight strategies—as well as the mechanical integration of audio hardware that enables clear, reliable two-way communication with customers and law enforcement. You’ll work both independently and with partners to bring these systems from concept through production.

Requirements

Bachelor's or Master’s degree in Mechanical Engineering or related field
5–8 years of experience in mechanical design, ideally in robotics, automotive, or consumer hardware
Strong proficiency in CAD (SolidWorks, Creo, NX, or similar) with experience delivering production-ready designs
Demonstrated experience designing and integrating lighting systems or optical/mechatronic components
Experience packaging and integrating audio components (speakers, microphones) into complex systems
Solid understanding of DFM/DFA, tolerance stack-ups, and manufacturing processes (e.g., injection molding, sealing, adhesives)
Experience working directly with suppliers and external partners through development and production
Ability to operate with high ownership and autonomy, while collaborating effectively across disciplines

Nice To Haves

Experience with automotive or robotic lighting systems
Familiarity with IP-rated designs and environmental sealing strategies
Basic understanding of acoustics and optical performance
Experience designing interactive or expressive hardware systems
Comfort working in fast-paced, iterative development environments

Responsibilities

Own end-to-end development of DOT’s lighting systems, including: Interactive “eyeball” lighting elements that convey intent and state, Headlight and taillight architectures balancing safety, compliance, and brand expression, Integration of LEDs, light pipes, diffusers, and housings
Lead the mechanical design and integration of audio systems, including: Speaker enclosures optimized for clarity and environmental durability, Microphone placement and packaging for effective two-way communication in real-world conditions
Translate product and UX requirements into robust mechanical designs that enable intuitive interaction through light and sound
Develop detailed CAD models, assemblies, and production drawings, and drive design reviews
Collaborate cross-functionally with EE, firmware, industrial design, and product teams to ensure seamless system integration
Work with external vendors and partners to co-develop components, manage design trade-offs, and ensure quality
Drive prototyping, testing, and validation, including environmental (weather, vibration, ingress) and performance testing
Make informed decisions around materials, manufacturing processes, and cost, ensuring designs are production-ready
Contribute to system architecture and help define best practices for interactive hardware systems