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About the Role
Redwood Materials is seeking a Power Electronics Engineer to design and develop power conversion systems for next-generation Battery Energy Storage Systems (BESS). This role involves designing converters that interface with battery packs, photovoltaic systems, and the grid for utility-scale and data center applications. The engineer will independently manage complex circuit and system-level problems, from topology selection to validation, and collaborate with various cross-functional teams.
Responsibilities
- Design high-voltage (800V – 25kVdc, 480–800Vac) and high-power (10kW–500kW) converters for utility-scale BESS and industrial infrastructure.
- Conduct comprehensive topology comparison and trade-off analyses evaluating efficiency, power density, cost, and manufacturability.
- Perform power-stage component sizing and Si/SiC MOSFET selection based on loss modeling and thermal management.
- Design robust gate driver circuits and dedicated gate driver power supplies.
- Lead the design, modeling, and specification of custom magnetic components, including transformers and inductors.
- Architect the low-voltage (LV) subsystem, including auxiliary power supplies, sensing circuitry, and hardware-level protection.
- Design and optimize EMI filters.
- Drive high-voltage, high-power PCB/PCBA layout design, ensuring clearance/creepage rules and signal integrity.
- Collaborate with cross-functional teams to define requirements, test specifications, and achieve industry certifications.
Requirements
- 5-7 years of experience in electrical engineering, with a strong focus on power conversion or energy storage products, ideally for mass production.
- Hands-on experience in high-voltage (up to 1.5kVdc and 800Vac) hardware design.
- Experience in high voltage (up to 25kVdc, 34.5kVac) for SST is a plus.
- Experience with power semiconductor selection, gate drive design, and hardware protection circuits.
- Proficiency with circuit simulation, FEA simulation, and CAD tools (e.g., Simulink, LTspice, Ansys Maxwell/Q3D, Altium Designer).
- Demonstrated ability to perform detailed layout of high-power, noise-sensitive PCBs in Altium or equivalent CAD software.
- Proficiency with lab equipment, including oscilloscopes, impedance analyzers, network analyzers, and signal generators.
- Excellent written and verbal communication skills.
- Foundational knowledge of control theory and embedded systems.
- Strong analytical and systematic problem-solving skills.
- Proven track record of rapid prototyping and hardware iterations based on cross-functional and supplier feedback.
- Strong ability to select circuit components considering both electrical performance and manufacturability (DFM).
- Experience mentoring test technicians to execute design verification, interpret test data, and define component maturity criteria.
Skills
- Power electronics
- Energy storage
- Circuit simulation
- FEA simulation
- CAD tools
- Altium Designer
- Lab equipment proficiency
- Control theory
- Embedded systems
- Problem-solving
- Prototyping
- Hardware design
- Component selection
- DFM (Design for Manufacturability)
Location
- 100 Hooper, San Francisco
Work Type
- On-site
- Full-time
Experience Level
- 5-7 years of experience
Education Level
- MS or PhD in Electrical Engineering, with a focus on power electronics
Salary/Compensations
- $160,000—$200,000 USD
About the Company
- Redwood Materials was founded in 2017 by JB Straubel, co-founder and former CTO of Tesla.
- The company's mission is to recover, refine, and redeploy critical minerals from end-of-life batteries back into the supply chain.
- Redwood is the largest lithium-ion battery recycler in North America.
- The company has deployed the largest second-life battery project in the world, delivering power to AI data centers.
- Redwood utilizes proprietary energy architecture engineered entirely in-house.
- The company is profitable and operates in a market projected to grow significantly over the next decade.
- Redwood is positioned to lead the market due to its supply chain, technology, and operational scale.