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Salary: USD 100,000 - 132,500 / annual
Redwood Materials, founded by Tesla co-founder JB Straubel in 2017, is North America's largest lithium-ion battery recycler and has deployed the world's largest second-life battery project for AI data centers. The company is profitable and positioned to lead a market projected to grow 20–50x over the next decade.
The Electrical Engineer, Energy Storage will design and develop the system controller hardware that serves as the brain of Redwood's next-generation high-power electromechanical products—power converters that interface with battery packs, battery modules, photovoltaic systems, and the grid for large-scale energy storage applications, including AI data centers. This is a fully on-site role based at 100 Hooper or LH 2 in the San Francisco Bay Area or Carson City, NV.
You will independently own the low-voltage (LV) electrical system architecture, including system controller PCBA design, MCU selection and communication protocols, isolated sensing circuits, auxiliary power supplies, and protective circuits (breaker/contactor drivers, E-stop loops). You will devise solutions to new and unusual system-integration challenges with limited precedents. The role partners extensively with Mechanical, Firmware/Controls, Systems, Compliance, Supply Chain, Manufacturing, and Reliability teams to define requirements and take designs from concept through production.
Key responsibilities include:
- Own LV electrical system architecture for power electronics products, including the system controller PCBA that coordinates parallel/series-connected power converter modules
- Design and integrate system controller hardware, including MCU selection, communication protocols (CAN, Ethernet, etc.), and control logic for module synchronization, current-sharing, and startup/shutdown sequencing
- Design isolated sensing circuits (current, voltage, temperature feedback) and auxiliary power supply architecture across LV subsystems (~100W)
- Design and coordinate protective circuits (breaker/contactor drivers, hardware interlock/E-stop loops), ensuring insulation coordination and high-voltage safety compliance at the system level
- Define LV wiring architecture, grounding, and interconnect strategy across the entire product and sub power modules
- Lead electrical testing and validation for system controller PCBA and complete power electronics products, including power cycling, fault analysis, and performance characterization
- Collaborate with cross-functional teams to define system requirements, test specifications, and achieve industry certifications (e.g., IEEE 1547, UL 1741)
- Ability to travel up to 10% of the time
Requirements:
- BS or MS in Electrical Engineering, with a focus on embedded systems, controls, or power electronics
- 3–5 years of experience in electrical engineering, with a strong focus on system-level control architecture for power conversion or energy storage products
- Hands-on experience designing MCU-based system controllers, including MCU selection, memory/peripheral budgeting, and system-level control for power converters
- Experience with industrial communication protocols (CAN, Ethernet) for module-to-controller and controller-to-grid/BMS interfaces
- Deep understanding of protection coordination (breaker/contactor drivers, hardware interlock and E-stop loops, fault detection and sequencing logic) and proficiency with circuit simulation/CAD tools (e.g., Altium Designer, LTspice, Simulink)
- Demonstrated ability to lay out control PCBs in noise-sensitive, high-power environments, and proficiency with lab equipment (oscilloscopes, logic/protocol analyzers, signal generators)
