Senior Electrical Hardware Test Engineer, Energy Storage

About Redwood Materials Redwood Materials was founded in 2017 by JB Straubel, co-founder and former CTO of Tesla, on a simple but radical idea: the critical minerals powering the energy transition already exist. They just need to come back. Today Redwood is the largest lithium-ion battery recycler in North America — recovering, refining, and redeploying critical minerals from end-of-life batteries back into the supply chain. On the energy side, Redwood has deployed the largest second-life battery project in the world, delivering power to AI data centers in months rather than years using proprietary energy architecture engineered entirely in-house. The company is profitable, the market it operates in is projected to grow 20 to 50 times over the next decade, and Redwood is the only company with the supply chain, the technology, and the operational scale to lead it. Position Summary: Join Redwood Materials to validate the high-voltage power electronics behind the world’s energy storage systems. You’ll design and run validation tests on components and assemblies operating at 400–2000VDC and 480–800VAC. You’ll work directly from schematics, Altium layouts, and datasheets to understand switching topologies, gate drive, isolation, protection, and thermal behavior, then use that understanding to build sharper tests. When something fails, you’ll probe the circuit, isolate the fault, and drive root cause to the component level. You’ll design and source custom PCBAs for characterization, build electrical-focused test infrastructure with mechanical and software elements, and write Python tools to automate testing and analyze data. Working alongside design, reliability, and abuse engineers on FMEAs and test plans, you’ll turn complex data into design and process improvements that ship. If you thrive at the bench, love finding the real cause of a failure, and want your work to matter from day one, this is your role.…