Redwood Materials

Recycles lithium-ion batteries into materials

Reliability Engineer - Energy Storage

Hardware Validation & TestingConfirmed live in the last 24 hours

Full-timeSan Francisco, CA, USA$122.5k - $192.5kIn-person

About the Job

Requirements

A Bachelor’s or Master’s degree in Electrical Engineering, Mechanical Engineering, Materials Science, or a related field.
At least 5 years of experience in hardware reliability engineering.
Deep knowledge of electronic and mechanical failure mechanisms, such as solder fatigue, corrosion, delamination, sealing failures, thermal expansion mismatch, and material fatigue.
Proficiency with statistical analysis tools such as Minitab, JMP, or Python.
Experience with reliability lab equipment and test setup design.
Knowledge of reliability warranty analysis and reliability prediction methods.
Working knowledge of failure analysis techniques such as optical microscopy, scanning electron microscopy, C-SAM, X-ray, cross-sectioning, and energy-dispersive X-ray spectroscopy.

Responsibilities

Define and own the reliability strategy for hardware products with complex printed circuit board assemblies and electromechanical systems.
Plan and execute reliability tests such as highly accelerated life testing, thermal cycling, vibration, drop, humidity, ingress protection testing, and power cycling.
Collaborate with cross-functional teams to define design-for-reliability requirements and drive root cause analysis for test failures.
Track reliability key performance indicators and deliver reliability insights to guide design improvements and product decisions.
Develop accelerated life test models and support failure mode and effects analysis and design failure mode and effects analysis processes.
Analyze reliability data using Weibull, log-normal, and other statistical models to predict field performance.
Work with engineering teams to establish reliability gates through program stages A, B, C, and D.
Support failure analysis efforts using tools such as X-ray, cross-sectioning, and scanning electron microscopy/energy-dispersive X-ray spectroscopy to identify failure mechanisms in printed circuit board assemblies.
Contribute to continuous improvement across reliability processes, lab capabilities, and test methodologies.
Author reports and document findings.

Desired Qualifications

Experience in industries such as energy, electric vehicles, consumer electronics, or aerospace.

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.

Reliability Engineer, Energy Storage

As an early member of a new engineering team, you will be responsible for defining system reliability requirements, generating damage models, and characterizing the reliability of our new product. You will work cross-functionally to define requirements, analyze designs, and design tests to meet high reliability standards in real-world conditions, including both electrical and mechanical failure modes.

You’re a doer, excited about getting your hands dirty and working in a dynamic, fast-paced setting, and want to shape a new department at Redwood.

Responsibilities will include:

Define and own the reliability strategy for hardware products with complex printed circuit board assemblies (PCBAs) and electromechanical systems
Plan and execute reliability tests such as HALT, thermal cycling, vibration, drop, humidity, ingress protection (IP) testing, and power cycling
Collaborate with cross-functional teams to define design-for-reliability (DfR) requirements and drive root cause analysis for test failures
Track reliability KPIs and deliver reliability insights to guide design improvements and product decisions
Develop accelerated life test models and support FMEA and DFMEA processes
Analyze reliability data using Weibull, log-normal, and other statistical models to predict field performance
Work closely with engineering teams to establish reliability gates through program stages (A/B/C/D)
Support failure analysis (FA) efforts using tools like X-ray, cross-sectioning, and SEM/EDX to identify failure mechanisms in PCBAs
Contribute to continuous improvement efforts across reliability processes, lab capabilities, and test methodologies
Author reports / document findings

Desired Qualifications:

Bachelor’s or Master’s degree in Electrical Engineering, Mechanical Engineering, Materials Science, or a related field
5 + years of experience in hardware reliability engineering, preferably in industries like energy, EV, consumer electronics, or aerospace
Deep knowledge of electronic and mechanical failure mechanisms (e.g., solder fatigue, corrosion, delamination, sealing failures, thermal expansion mismatch, material fatigue, etc.)
Proficiency in statistical analysis tools (e.g., Minitab, JMP, or Python)
Experience with reliability lab equipment and test setup design
Knowledge of reliability warranty analysis and reliability prediction methods
Working knowledge of failure analysis techniques such as optical microscopy, SEM, CSAM, X-ray, cross-sectioning, and EDX
A passion for sustainability and making the world a better place!

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:

$122,500—$192,500 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: 122500 - 192500 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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