Battery Engineer II

WHOOP

Battery Engineer II

Reposted 7 Hours Ago

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Boston MA USA

Hybrid

110K-150K Annually

Junior

Fitness • Hardware • Healthtech • Sports • Wearables

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The Role

Design execute and document battery pack and component test plans for validation qualification and safety. Collaborate with cross-functional teams and suppliers support regulatory certifications (UL/CE/IEC) run failure analysis and DFMEA evaluate lithium-ion performance and manufacturability and manage supplier testing and verification. Travel to supplier sites as needed (up to 15%).

Summary Generated by Built In

At WHOOP we're on a mission to unlock human performance and healthspan. WHOOP empowers members to perform at a higher level through a deeper understanding of their bodies and daily lives.

As a Battery Engineer II at WHOOP you will help ensure the quality reliability and performance of the batteries that power our products. Working closely with cross-functional engineering teams suppliers and third-party testing labs you will support the validation and development of next-generation battery systems through testing failure analysis supplier qualification regulatory compliance and continuous design improvement. You will contribute to advancing battery technology by improving validation processes testing standards and technical documentation across the product development lifecycle. This is a hands-on role with the opportunity to drive meaningful impact through experimentation analysis and collaboration.

RESPONSIBILTIES:

Develop execute and document battery pack system and component-level test plans for design validation qualification performance durability and safety across NPI programs and internal evaluations

Collaborate with multidisciplinary engineering teams and suppliers across the globe to translate system and cell-level safety and performance requirements into functional battery pack architectures

Support regulatory certification activities (e.g. UL CE IEC) internal safety audits DFMEA risk assessments root cause analysis and failure investigation workflows

Manage testing review supplier test reports and support verification and validation for new projects suppliers and alternate battery technologies

Evaluate lithium-ion batteries across different designs use cases and WHOOP product conditions to assess performance safety longevity and manufacturability

Travel to supplier sites as needed for line audits design reviews builds and joint problem-solving (up to 15%)

QUALIFICATIONS:

BS with 2+ years of experience in battery systems or MS with 1+ years experience

Experience in lithium-ion battery development testing validation or related academic research along with designing modelling and validating rechargeable battery systems

Strong understanding of lithium-ion cell design battery chemistry battery testing standards safety guidelines and lab instrumentation

Experience writing technical reports and documenting test plans quality findings supplier assessments regulatory compliance activities and test evaluations

Strong communication skills for battery-related technical topics clearly in cross-functional settings

Understanding of tolerance stack analysis mechanical GD&T and measurement methods

Familiarity with Python or similar tools for data visualization analysis and automation

Awareness of emerging battery technologies materials and market trends

Strong commitment to embracing and leveraging AI tools in day-to-day tasks ensuring AI-assisted work aligns with the same high-quality standards as personal contributions

This role is based in the WHOOP office located in Boston MA. The successful candidate must be prepared to relocate if necessary to work out of the Boston MA office.

Interested in the role but don’t meet every qualification? We encourage you to still apply! At WHOOP we believe there is much more to a candidate than what is written on paper and we value character as much as experience. As we continue to build a diverse and inclusive environment we encourage anyone who is interested in this role to apply.

WHOOP is an Equal Opportunity Employer and participates in E-verify to determine employment eligibility. It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

The WHOOP compensation philosophy is designed to attract motivate and retain exceptional talent by offering competitive base salaries meaningful equity and consistent pay practices that reflect our mission and core values.

At WHOOP we view total compensation as the combination of base salary equity and benefits with equity serving as a key differentiator that aligns our employees with the long-term success of the company and allows every member of our corporate team to own part of WHOOP and share in the company’s long-term growth and success.

The U.S. base salary range for this full-time position is $110000 - $150000. Salary ranges are determined by role level and location. Within each range individual pay is based on factors such as job-related skills experience performance and relevant education or training.

In addition to the base salary the successful candidate will also receive benefits and a generous equity package.

These ranges may be modified in the future to reflect evolving market conditions and organizational needs. While most offers will typically fall toward the starting point of the range total compensation will depend on the candidate’s specific qualifications expertise and alignment with the role’s requirements.

Skills Required

BS with 2+ years experience or MS with 1+ years experience in battery systems
Experience in lithium-ion battery development testing validation or related academic research
Designing modeling and validating rechargeable battery systems
Strong understanding of lithium-ion cell design battery chemistry battery testing standards safety guidelines and lab instrumentation
Experience with regulatory certification activities (UL CE IEC) DFMEA risk assessments root cause analysis and failure investigation
Experience writing technical reports and documenting test plans quality findings supplier assessments and test evaluations
Understanding of tolerance stack analysis mechanical GD&T and measurement methods
Familiarity with Python or similar tools for data visualization analysis and automation
Strong communication skills for technical topics in cross-functional settings
Willingness to travel to supplier sites (up to 15%) and participate in supplier audits and design reviews
Ability and willingness to relocate and work out of the Boston MA office
Awareness of emerging battery technologies materials and market trends
Commitment to embracing and leveraging AI tools in day-to-day tasks

What the Team is Saying

WHOOP Compensation & Benefits Highlights

Parental & Family Support—Parental leave is described as generous with an additional transition period to support return-to-work. Feedback suggests this policy stands out within the overall package.
Wellbeing & Lifestyle Benefits—Wellness stipends free WHOOP memberships (including a giftable one) a sleep-performance cash incentive daily meals and access to onsite gym and recovery tools create a lifestyle-oriented offering. Feedback suggests these perks meaningfully enhance the total rewards experience beyond base pay.
Equity Value & Accessibility—Equity participation and stock option eligibility are highlighted and ownership is portrayed as rewarding as the company grows. Feedback suggests this sense of ownership positively influences perceptions of compensation.

Learn more about WHOOP's Compensation & Benefits →

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The Company

HQ: Boston MA

500 Employees

Year Founded: 2012

What We Do

At WHOOP we’re on a mission to unlock human performance. WHOOP empowers members to perform at a higher level through a deeper understanding of their bodies and daily lives. Our wearable device and performance optimization platform has been adopted by many of the world's greatest athletes and consumers alike.

Why Work With Us

At WHOOP we’re focused on building an inclusive and equitable team with a strong sense of belonging for everyone—increasing representation in every way as our team grows. We believe that our differences are our source of strength—so much so it’s one of our core values. 