Test Automation Engineer Intern, Redwood Materials
Fall 2026
California Pay Range: $41 - $47.50 USD
Battery recycling startup
Posted today
Battery recycling startup
501-1000 employees
Posted today
California Pay Range: $41 - $47.50 USD
501-1000 employees
Company mission
To build a circular supply chain to power a sustainable world and accelerate the reduction of fossil fuels.
Role
Who you are
- Background: Currently pursuing a BS or MS in Electrical Engineering, Computer Engineering, Computer Science, Mechatronics, or a related field
- Programming Foundations: Working proficiency in Python, including comfort reading and modifying a codebase you did not write
- Testing Experience: Experience writing automated tests with pytest or a comparable framework, from coursework, projects, or prior internships
- Version Control: Experience with Git and a pull-request-based development workflow
- EE Fundamentals: Solid grasp of circuit basics — voltage, current, resistance, and power, and how they relate — sufficient to predict what a measurement should read and recognize when it doesn't
- Hardware Fundamentals: Able to read a schematic, wiring diagram, or datasheet and act on it; hands-on experience working safely around energized equipment — power supplies, loads, or battery hardware — from lab work, projects, or prior internships
- Communication Protocols: Familiarity with CAN, Modbus, SCPI, or other instrument and industrial protocols is a plus, even if only from classwork or personal projects
- Linux: Familiarity with the Linux command line is a plus
- Curiosity & Rigor: A safety-conscious mindset, strong attention to detail, and eagerness to learn how production test systems are built. Prior industry or energy storage experience is not expected
What the job involves
- Redwood Energy is building some of the fastest, lowest-cost energy storage in the U.S. from both new battery modules and second-life EV packs
- Second-life hardware arrives with a history — different chemistries, capacities, and states of health — and every unit has to be proven safe and reliable before it ships
- That proof comes from test: the automated systems that exercise the firmware and electronics inside our products and decide whether they're ready for the field
- Our test engineering team builds those systems — the test stands on the production floor, the hardware-in-the-loop benches that validate firmware releases, and the CI pipelines that tie them together
- As a Test Automation Engineering Intern, you'll work alongside our engineers building the next generation of this test capability
- You'll write Python that drives real instruments and real battery hardware, help bring up new test stands from the bench up, and debug failures where the root cause could live in the test code, the firmware, or the unit under test
- This is a great opportunity to apply what you've learned in coursework to production test systems, with mentorship from experienced engineers along the way
- Test Automation: Write and maintain Python test automation for firmware and hardware validation, using pytest and our internal test frameworks
- Instrument Control: Develop drivers and tooling for programmable power supplies, electronic loads, data acquisition, and switching hardware over protocols like SCPI, CAN, and Modbus
- Test Stand Bring-Up: Help bring up new test stands — from fixtures and wiring through the software that sequences them — as we expand our validation capability
- System Debugging: Investigate real failures on real equipment, using CAN traces, instrument logs, and bench tools to determine whether the fault lies in the test code, the fixture, or the unit under test
- Continuous Integration: Add regression coverage to our CI pipelines so firmware changes are validated automatically rather than by hand
- Documentation & Process: Contribute to documentation and test processes that support taking test systems from prototype toward production
- You'll own a scoped project end to end and present your results to the engineering team at the close of the internship
Our take
Redwood Materials, the brainchild of former Tesla co-founder and CTO JB Straubel, is making waves in the sustainable energy sector with its strategic approach to battery recycling and domestic supply chains for lithium-ion batteries.
The company is dedicated to creating a fully closed-loop supply chain by manufacturing critical battery components using as many recycled batteries as possible, effectively localising a 50,000-mile global battery supply chain on a single site. This strategy aims to address the critical issue of material sourcing, particularly the reliance on China for battery materials.
Redwood Materials has raised massive funding and earned a valuation exceeding $6 billion. This positions the company to expand capacity, further strengthening the US's domestic battery supply chain. Its ambitious goal of enabling customers to purchase battery materials made in the US is aligned directly with the broader political objective of onshoring critical industries, as emphasised in the USA's 2022 Inflation Reduction Act.
Freddie
Company Specialist at Welcome to the Jungle
Insights
Company
Funding (last 2 of 7 rounds)
Feb 2026
$75m
SERIES E
Oct 2025
$350m
SERIES E
Total funding: $2.2bn
Company HQ
Carson City, NV
Leadership
JB Straubel
(CEO)Co-founder of Tesla where they spent 15 years as CTO before founding Redwood Materials. They currently serve on the Board of Directors at Tesla and as a Board Member at QuantumScape.
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