Battery Software & Controls Integration Engineer

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Battery Software & Controls Integration Engineer in USA new

Redwood Materials
Full time
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USA
10/30/2026
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San Francisco, CA

Responsibilities

Lead benchtop and laboratory bring-up of second-life EV battery packs and reverse-engineer proprietary BMS architectures.
Capture and decode CAN, CAN-FD, LIN, Ethernet, and vehicle-level wake, crash, interlock, pre-charge, and contactor signals.
Design hardware and HIL test campaigns to validate OEM BMS state-of-charge, state-of-health, power-limit, thermal, resistance, balancing, and fault-threshold behavior.
Implement and integrate Redwood’s battery state-estimation, degradation-mitigation, active-balancing, and derating algorithms in Rust or C/C++.
Architect embedded software abstraction layers and translation gateways for pack telemetry, fault state machines, PCS interfaces, and site controllers.
Act as the primary technical counterpart to automotive OEMs and Tier-1 BMS suppliers on firmware builds, lookup tables, diagnostic data, and deterministic command hooks.
Model pack dynamics, inject sensor and contactor faults, and verify functional safety boundaries using HIL benches and physical cyclers.

Requirements

MS or PhD in Electrical Engineering, Computer Engineering, Chemical/Electrochemical Engineering, or a related field.
At least 5 years of hands-on experience in BMS firmware or controls development, battery pack bring-up, or EV/BESS battery integration.
Deep practical knowledge of lithium-ion battery physics, LFP and NMC chemistries, equivalent-circuit modeling, Kalman filtering, Coulomb counting, power-limit calculation, cell balancing, and high-voltage safety architecture.
Expertise with oscilloscopes, logic analyzers, CANalyzer, CANoe, busmaster, high-voltage power supplies and cyclers, and diagnostic protocols including UDS, CCP/XCP, J1939, CAN/CAN-FD, Automotive Ethernet, and Modbus.
Strong programming proficiency in Rust and C/C++ in real-time embedded and Linux environments, plus experience with MATLAB/Simulink, Pandas, or SciPy for data analysis and modeling.
Demonstrated ability to work with undocumented or partially documented battery packs and to lead technical engagements with external OEM engineering teams.
Preferred experience with aged or second-life EV batteries, capacity-fade modeling, impedance spectroscopy, and open-circuit-voltage hysteresis.
Preferred experience modifying bare-metal or RTOS BMS firmware on automotive microcontrollers such as TI C2000/Hercules, NXP S32K, and Infineon Aurix, and interfacing with TI, ADI/LTC, or NXP AFE chips.

Benefits

Full-time position based in the San Francisco office with an onsite work model.
California pay range is $152,000—$287,000 USD, with compensation commensurate with experience.

Salary: $152k - $287k/yr

Redwood Materials

Redwood Materials is building a sustainable, closed-loop supply chain for lithium-ion batteries by recycling, refining, and remanufacturing their core components. Our focus is on keeping critical minerals in circulation to support the growing energy transition, while delivering low-cost and large...

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