Battery Test Engineer

The Role

We are seeking a hands-on Battery Test Engineer with a proactive, get-it-done attitude to join a team qualifying next-generation BMS algorithms and architectures. You will be instrumental in turning algorithm designs into validated, production-ready battery systems that deliver exceptional user experience for portable consumer products.

This position contributes to the development and qualification of advanced lithium ion battery technology for portable power consumer applications. You will work with the Battery Software Qualification team to develop battery firmware, algorithm and BMS qualification protocols to ensure high-level user experience. You will collaborate with algorithm engineers and other test engineers in the team to improve the quality, productivity and efficiency of these consumer products.

Location

Cupertino, California, USA

Work Schedule

On-site.

What You’ll Do

• Execute test plans — Run electrical and battery cycler test plans provided by algorithm engineers and deliver high-quality data on schedule.
• Analyze and investigate — Support algorithm engineers by analyzing test data and investigating abnormal observations.
• Troubleshoot and maintain — Diagnose equipment and sample issues; maintain and repair test equipment as needed.
• Automate validation — Co-develop automated validation processes and test automation with other test engineers.
• Collaborate across teams — Work closely with algorithm engineers and test peers to improve product quality, productivity, and efficiency.

What You Bring (Must-Haves)

• Degree — M.Sc. in Electrical Engineering or Computer Science, or B.Sc. with relevant industrial experience.
• Programming — Strong programming skills, preferably in Python, for test automation.
• Test equipment experience — Hands-on experience with battery testers, source meters, multimeters, and similar tools.
• Debugging — Excellent debugging skills for tackling challenging electrical and system problems.
• Circuit work — Practical experience working on electrical circuits.

What We’d Love to See (Nice-Haves)

• Battery knowledge — Familiarity with Li-ion battery chemistry and behavior.
• BMS experience — Experience in BMS algorithm, firmware, software development, or validation.
• Communication — Strong communication skills for cross-functional collaboration.
• Team fit — Comfortable working in a collaborative, dynamic environment.
• Attention to detail — Proven track record on tasks requiring high accuracy and attention to detail.

What We Offer

• Benefits — Excellent, full coverage medical, dental, and vision insurance; Generous PTO and 15 company-wide holidays; 401k with company contribution; Paid parental leave; Work-life balance with an emphasis on personal well-being; Career growth in a disruptor space & entrepreneurial opportunities within the Monks network; A globally diverse & inclusive culture with employee resource groups such as S4 Melanin, Pride.Monks, Cultura.Monks, and more!
• About Monks — Monks is the global, digital-first, data-driven, unitary operating brand of S4 Capital plc. With a legacy of innovation and specialized expertise, Monks combines an extraordinary range of global Marketing and Technology Services to redefine how brands interact with the world. Through Monks.Flow, its flagship AI ecosystem for marketing orchestration, Monks transforms marketing into a growth engine, collapsing timelines and connecting brands to culture in real time. By deploying bespoke intelligent agents across disciplines and delivering culturally relevant, high-impact creative and digital solutions, Monks solves key critical business challenges across the entire brand enterprise to help brands sustain long-term impact.

Salary Range

$130,000—$160,000 USD

About Monks

Monks is the global, digital-first, data-driven, unitary operating brand of S4 Capital plc. With a legacy of innovation and specialized expertise, Monks combines an extraordinary range of global Marketing and Technology Services to redefine how brands interact with the world. Through Monks.Flow, its flagship AI ecosystem for marketing orchestration, Monks transforms marketing into a growth engine, collapsing timelines and connecting brands to culture in real time. By deploying bespoke intelligent agents across disciplines and delivering culturally relevant, high-impact creative and digital solutions, Monks solves key critical business challenges across the entire brand enterprise to help brands sustain long-term impact.