Various positions | ReJoule | Signal Hill, CA

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Battery Diagnostics Engineer (full-time, remote/hybrid preferred)

We are currently hiring a full time Battery Diagnostics Engineer to join our dynamic and tight-knit team and be at the forefront of battery diagnostics, analytics, and testing. In this role you will own the data and analysis path from raw field data to a defensible state-of-health result, and help build the measurement methods that make that result an industry reference. Candidates should be passionate about using data to uncover truth, and even more passionate about creating a more sustainable future. We are looking for highly motivated self-starters comfortable in an early stage company environment. You would work with and report directly to our Electronics Team Lead as part of the technical team. This is a remote-first position, though preference may be given to those who can join the team in a hybrid capacity.

Temp Electrical Engineer (4-month contract)

We are currently hiring a Temp Electrical Engineer to join our team. In this role you will work with the engineering team to build and test our latest rapid diagnostic test equipment. In this role you will assist in designing, implementing, and testing hardware circuits for mixed-signal electronics applications such as switch mode power supply and battery management system applications. Candidates should be passionate about hardware and software integration of electronics, and even more passionate about creating a more sustainable future. We are looking for highly motivated self-starters comfortable in an early stage company environment. This is an on-site position that starts as a 4 month contract.

Part time Project Manager – Energy Storage (remote/hybrid)

We are seeking a Project Manager to join our dynamic and tight-knit team and be at the forefront of the growing second-life battery industry. In this role you will own the outcome and be responsible for ensuring our major CARES (communities accessing resilient energy storage) project moves forward. This role bridges the gap between technical execution and strategic stakeholder alignment—coordinating internal engineering teams, non-technical site hosts, offtakers, financiers, and federal/state grant administrators.

If you have a background spanning renewable energy, energy storage, policy/grant navigation, and financial modeling, and thrive when wearing many hats, this role is for you.

• Work Structure: Remote-friendly with occasional site travel, or hybrid at our Signal Hill, CA office. (California residency or openness to relocating is preferred).

• Hours: Part-time commitment starting at 10–20 hours/week, with potential to scale up to 30 hours/week or transition to full-time as project scope ramps up.