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Firmware Engineer, Energy Storage
Redwood Materials
San Francisco, CA, USA
USD 171k-231k / year
Posted on Sep 24, 2025
About Redwood Materials
Redwood is localizing a global battery supply chain that seamlessly integrates recovery, reuse, and recycling — keeping critical minerals in circulation and driving the energy transition. Founded in 2019, we’re delivering low-cost and large-scale energy storage and producing battery materials in the U.S. for the first time, all from batteries we already have.
Firmware Engineer, Energy Storage
Essential Duties:
You will be an early member of a new engineering team, taking a hands-on role in the design, development, and integration of a new product at Redwood. This position focuses on developing robust and reliable firmware from scratch for ARM Cortex-M class microcontrollers to function within large scale, distributed industrial applications. You will work on communication with and control of various off-the-shelf devices as well as control algorithms for power electronics.
The ideal candidate is highly self-driven, adaptable to a startup environment, and eager to take on novel technical challenges. If you're excited about working in a dynamic, fast-paced setting within a new department at Redwood, we want to hear from you!
If necessary, the job level will be adjusted to suit the applicant’s experience and responsibilities.
Responsibilities will include:
- Help build a new embedded firmware platform from scratch with a focus on robust and performant network communication
- Design and implement frameworks to support simulation and SIL/HIL integration testing
- Design and deploy state estimation and power electronics control algorithms optimized for a resource-constrained environment
- Collaborate with electrical and systems engineers closely to specify and implement system behaviors and diagnostics coverage
- Produce excellent software documentation
- Contribute to a collaborative, fast-paced startup culture, where every team member plays a crucial role in achieving company milestones
Desired Qualifications:
- BS or MS in Electrical/Computer Engineering or Computer Science
- 7+ years of experience in firmware engineering, with a strong focus in power conversion, renewable energy systems, or similar
- Proven track record in shipping new products at scale
- Excellent proficiency in Rust or C and debugging embedded systems
- Experience with digital protocols such as SPI, CAN, and Ethernet as well as application layer protocols such as CoAP or MQTT
- Expert knowledge of microcontroller hardware peripherals and RTOS
- Experience with CI/CD & test automation applied to software-enabled hardware products
- Proficiency in Python preferred
- Good to have experience with reverse engineering CAN protocols and developing custom diagnostic tools for evaluating embedded systems
- Self-motivated, with the ability to manage your work in a startup environment, balancing multiple priorities and deadlines
- Excellent communication and interpersonal skills, with ability to build relationships with all levels of the organization and present to internal and external executives
Physical Requirements:
- Ability to perform the essential job functions consistent safely and successfully with the ADA, FMLA and other federal, state and local standards, including meeting qualitative and/or quantitative productivity standards
- Ability to maintain regular, punctual attendance consistent with the ADA, FMLA and other federal, state, and local standards
Working Conditions:
- Environment, such as office or outdoors
- Ability to work in challenging working conditions which may include exposure to noise, dust, chemicals, and temperature extremes, while protected by PPE, for extended periods of time
- Essential physical requirements, such as climbing, standing, stooping, or typing
- Occasional work weekends, nights, or be on-call as a regular part of the job
- Occasional travel requirements
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:
$171,000—$231,000 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 privacy@redwoodmaterials.com.