Senior Battery Data Engineer, Redwood Materials
$172.5-198k
Battery recycling startup
Be an early applicant
Battery recycling startup
501-1000 employees
Be an early applicant
$172.5-198k
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
- BS or MS in Engineering (Mechanical, Chemical, Materials, Electrical), or a related field
- Strong software development skills in Python, including building production services, data pipelines, and APIs
- Familiarity with battery testing and cycler platforms (e.g., Arbin, Maccor, Neware)
- Experience with cloud data infrastructure (e.g., AWS, GCP, or Azure) for storing, processing, and serving large-scale time-series data
- Strong communication and collaboration skills; proactive in working directly with stakeholders to identify workflow bottlenecks and turn them into actionable software priorities
- Bonus: proficiency in Rust for building production services; experience building AI agent harnesses and eval suites; understanding of lithium-ion cell behavior and safety considerations; experience with AI coding assistants like Cursor or Claude Code
What the job involves
- The Senior Battery Data Engineer develops the software stack that powers Redwood's battery characterization program, spanning data pipelines, hardware control services, and workflows that connect test data to downstream modeling and analysis
- This is a fully on-site role at 100 Hooper. As the software stack matures, this role has the opportunity to shape it into a deterministic tool-calling layer, leveraging it to build an AI agent co-pilot that accelerates the characterization workflow, with evals co-developed alongside battery domain experts
- This role sits at the intersection of data infrastructure and systems automation, building the foundational software that powers battery modeling, algorithm, and qualification efforts
- Own the data infrastructure that serves large-scale battery time-series data from battery cyclers to cloud storage
- Contribute to the software services that orchestrate testing using commercial lab battery cyclers and in-house field-level power converters located at production sites
- Develop and maintain the tool layer for battery testing, such as structured protocol schemas, cycler control APIs, real-time battery test anomaly detection, and digital twin simulation
- Partner with battery test and algorithm engineers to identify inefficiencies, then design and build software or agentic workflows to automate them, utilizing the deterministic tool layer above
- Collaborate with domain experts to define agent eval suites and correctness criteria as agentic automation is introduced
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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