Battery Systems Engineer — Demo & Validation

Zēlos Energy Ltd; San Leandro (CA); On-site; USD 120,000 - 155,000; Full time

Benefits offered by this job

Excellent medical, dental, and vision

Paid holidays and unlimited PTO

Generous 401(k) and stock options

Free parking; free shuttle from San Le

Gate 510 incubator access and shared空间

Job summary

Zēlos Energy Ltd in the San Francisco Bay Area is seeking a Battery Systems Application Engineer to advance commercialization of our zinc-based battery technology. This full-time, on-site role located in San Leandro involves testing cells and packs, building demonstration systems, and engaging with integration partners to validate safety and reliability.

The ideal candidate will have an EE/ME background, 3+ years in battery systems, hands-on test experience, and skills in BMS, CAN/Modbus, and

Qualifications

• Bachelor's or Master's degree in Electrical, Mechanical, or related Engineering field.
• 3+ years developing, testing, or integrating rechargeable battery systems.
• Hands-on experience with battery testing equipment and data acquisition.
• Knowledge of battery chargers, BMS, and low‑voltage design.

Responsibilities

• Lead technical interactions with customers and battery integration partners, understanding application requirements and recommending practical electrical and mechanical design solutions.
• Review battery system architectures and support prototype integration, design reviews, and system validation.
• Design and execute test plans for battery cells, modules, and battery packs, including performance, cycle life, thermal, and safety testing.
• Analyze test data, identify failure mechanisms, and prepare technical reports and recommendations.
• Design, assemble, and validate prototype battery modules and demonstration battery packs.
• Develop electrical systems including battery chargers, Battery Management Systems (BMS), protection circuitry, wiring, and instrumentation.
• Collaborate with battery cell engineering team and product engineers to transition new cell designs into practical battery systems.

Skills

Battery systems

Data acquisition

Lab instrumentation

Electrical design

Thermal analysis

Technical communication

Education

Bachelor's or Master's in Electrical/Mechanical Engineering

Tools

CAN

Modbus

BMS configuration

Python

Job description

Zēlos Energy Ltd in the San Francisco Bay Area is seeking a Battery Systems Application Engineer to advance commercialization of our zinc-based battery technology. This full-time, on-site role located in San Leandro involves testing cells and packs, building demonstration systems, and engaging with integration partners to validate safety and reliability.

The ideal candidate will have an EE/ME background, 3+ years in battery systems, hands-on test experience, and skills in BMS, CAN/Modbus, and