Redwood Materials

Recycles lithium-ion batteries into materials

Senior Electrical Engineer - Energy Storage

Power Systems EngineeringConfirmed live in the last 24 hours

Full-time$120k - $155k

About the Job

Requirements

A Bachelor of Science or Master of Science in Electrical Engineering, with a focus on embedded systems, controls, or power electronics.
Three to five years of electrical engineering experience, with a strong focus on system-level control architecture for power conversion or energy storage products.
Hands-on experience designing microcontroller-based system controllers, including microcontroller selection, memory and peripheral budgeting, and system-level control for power converters.
Experience with industrial communication protocols such as Controller Area Network and Ethernet for module-to-controller and controller-to-grid or battery management system interfaces.
Deep understanding of protection coordination, including breaker and contactor drivers, hardware interlock and emergency-stop loops, fault detection, and sequencing logic.
Proficiency with circuit simulation and computer-aided design tools such as Altium Designer, LTspice, or Simulink.
Demonstrated ability to lay out control printed circuit boards in noise-sensitive, high-power environments.
Proficiency with laboratory equipment, including oscilloscopes, logic or protocol analyzers, and signal generators.
Ability to travel up to 10% of the time.

Responsibilities

Own low-voltage electrical system architecture for power electronics products, including the system controller printed circuit board assembly that coordinates parallel- and series-connected power converter modules.
Design and integrate system controller hardware, including microcontroller selection, communication protocols, and control logic for module synchronization, current sharing, and startup and shutdown sequencing.
Design isolated sensing circuits for current, voltage, and temperature feedback, and auxiliary power supply architecture across low-voltage subsystems of approximately 100 watts.
Design and coordinate protective circuits, including breaker and contactor drivers and hardware interlock and emergency-stop loops, ensuring insulation coordination and high-voltage safety compliance at the system level.
Define low-voltage wiring architecture, grounding, and interconnect strategy across the entire product and sub-power modules.
Lead electrical testing and validation for the system controller printed circuit board assembly and complete power electronics products, including power cycling, fault analysis, and performance characterization.
Collaborate with Mechanical, Controls/Firmware, Validation, Supply Chain, Manufacturing, Reliability, and Compliance teams to define system requirements and test specifications and achieve industry certifications such as IEEE 1547 and UL 1741.

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:

The Senior Electrical Engineer, Energy Storage designs and develops 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 (PV) 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. The engineer independently owns 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), devising solutions to new and unusual system-integration challenges from 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. Success depends on sound engineering judgment, hands-on lab validation skills, and the ability to resolve ambiguous system-level trade-offs with limited direction.

Essential Duties and Responsibilities

Own low-voltage (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 (Mechanical, Controls/Firmware, Validation, Supply Chain, Manufacturing, Reliability, Compliance) to define system requirements, test specifications, and achieve industry certifications (e.g., IEEE 1547, UL 1741)

Skills, Knowledge, and Abilities

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)
Ability to travel up to 10% of the time

In accordance with California pay transparency laws, the salary range for this position is listed below. Actual compensation may vary based on a variety of factors, including experience, education, and skills.

California Pay Range:

$120,000—$155,000 USD

The position is full-time. Compensation will be commensurate with experience.

We collect personal information (PI) from you in connection with your application for employment with Redwood Materials, including the following categories of PI: identifiers, personal records, professional or employment information, and inferences drawn from your PI. We collect your PI for our purposes, including performing services and operations related to your potential employment. If you have additional privacy-related questions, please contact us at [email protected].

California Pay Range: 120000 - 155000 USD

About the Company

Redwood Materials

Recycles lithium-ion batteries into materials

Redwood Materials builds a circular supply chain for lithium-ion batteries. It collects end-of-life batteries and manufacturing scraps, recovers most of the valuable minerals using its own processes, and then refines and remanufactures those materials into essential battery components like cathode active materials and anode copper foil, which are sold to battery manufacturers. In 2025 it added Redwood Energy to repurpose used EV batteries into grid-scale energy storage systems. The company differentiates itself through vertical integration across the full value chain—collection, recycling, refining, and remanufacturing—plus a focus on domestically sourced materials, high recovery rates, and partnerships with large automakers and battery makers. Its goal is to create a sustainable, domestic, closed-loop supply of battery materials to support electric vehicles and grid storage while reducing waste and dependence on imported minerals.

Company size: 501-1,000
Company stage: Late Stage VC
Total funding: $4.8B
Headquarters: Carson City, NV
Founded: 2017

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