About this role
About the Role
DoorDash Labs is seeking a skilled and safety-conscious Battery Hardware Technician to join our hardware engineering team. In this role, you will be the hands-on expert responsible for supporting the development, prototyping, and validation of our next-generation battery systems. You will bridge the gap between design and reality by building prototype battery packs, executing critical testing procedures, and managing day-to-day operations of our battery lab.
If you thrive in a fast-paced R&D environment and love working directly with cutting-edge energy storage systems, we want you on our team.
This is a fully onsite, in-person role based in San Francisco.
Key Responsibilities
• Prototype Battery Builds: Assemble, rework, and modify prototype battery packs and modules from the ground up, working directly with battery cells, modules, connector assemblies and printed circuit boards (PCBs).
• Precision Joining & Assembly: Perform precision spot welding, resistance welding, and soldering to interconnect cells and integrate Low-Voltage (LV) and High-Voltage (HV) wiring harnesses and connectors.
• Quality & Safety Testing: Support critical validation tests, including pressure/vacuum leak testing for sealed enclosures, insulation testing, and continuity checks.
• Lab Management & Safety: Own the maintenance, and safety compliance of the battery build and test laboratory. Ensure all equipment is calibrated, standard operating procedures (SOPs) are followed, and safety protocols for hazardous materials/high-voltage are strictly enforced.
• Test Execution & Data Logging: Set up, monitor, and manage battery test equipment (cyclers, environmental chambers, data loggers) and document build processes and test anomalies clearly for the engineering team.
Required Qualifications & Experience
• Battery Expertise: Minimum of 2–3 years of hands-on experience working directly with battery cells (lithium-ion preferred) and assembling battery packs.
• Welding & Joining: Proven experience with precision resistance welding, spot welding, and high-quality soldering techniques for electronics and busbars.
• Electrical & Mechanical Literacy: Strong proficiency in reading electrical schematics, mechanical drawings, and wiring diagrams. Experience routing and crimping HV/LV connectors and harnesses.
• Inspection Tools: Experience using leak testing equipment, digital multimeters, insulation testers (Hi-Pot), and standard hand/power tools.
• Safety First Mindset: Deep understanding of the safety hazards associated with lithium-ion cells and high-voltage systems, with a track record of maintaining a clean, orderly, and safe workspace.
Nice-to-Haves
• Experience with battery management systems (BMS) and basic PCB troubleshooting/rework of components.
• Familiarity with battery cyclers (e.g. Chroma) and environmental chambers.
• Prior experience in basic CAD (Fixtures etc), rapid prototyping or R&D environm