Battery Systems Firmware Engineer: BMS, SOC & Protection

QuantumScape; San Jose (CA); On-site; USD 150,000 - 190,000; Full time

Benefits offered by this job

On-site role

Job summary

QuantumScape in San Jose, CA is seeking a Firmware Engineer to own the battery management firmware for our high‑power battery packs. You will build a bare‑metal/RTOS platform, define MCU pinouts, implement protection and power sequencing, and ensure low‑power operation across modes.

You will also develop SOC/SOH estimation algorithms, write drivers for ADC, PWM and UART, collaborate with hardware and ODM partners, and create validation and regression test plans for reliable performance.

Qualifications

• 5+ years writing BMS firmware for lithium-Ion battery packs.
• Proficiency with TI C2000, STM32 or similar microcontroller platforms.
• In-depth understanding of timing and latency control of RTOS and Interrupts.
• Experienced in designing and fine-tuning SOC/SOH estimation algorithms.
• Familiar with configuring hardware peripherals (ADC, PWM, UART) and writing drivers.
• Capable of creating a firmware platform from scratch.

Responsibilities

• Create a firmware platform for the battery pack with bare metal/RTOS and drivers.
• Define pinouts of microcontrollers to ensure proper allocation of peripherals.
• Design protection functions with redundancy and consistent timing.
• Power sequencing and pre-charge control for inrush current limiting.
• Define states and transitions to cover all operating modes.
• Ensure minimum operating and sleep mode power consumption.
• Create a scheme for firmware read/write protections and upgrade.
• Collaborate with ODM partners to create and validate firmware protocols.
• Bring up hardware platforms that are built from scratch by identifying issues and working with hardware engineers to resolve them.
• Provide firmware validation and regression test plans to our lab.

Skills

BMS firmware

TI C2000

STM32

RTOS

SOC/SOH estimation

Peripheral drivers

C programming

Power electronics basics

Regulatory knowledge

Job description

QuantumScape in San Jose, CA is seeking a Firmware Engineer to own the battery management firmware for our high‑power battery packs. You will build a bare‑metal/RTOS platform, define MCU pinouts, implement protection and power sequencing, and ensure low‑power operation across modes.

You will also develop SOC/SOH estimation algorithms, write drivers for ADC, PWM and UART, collaborate with hardware and ODM partners, and create validation and regression test plans for reliable performance.