Whoop
Senior Battery Cell Engineer
Boston, MA · Senior · Full-time
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odds of building a lasting career here
Sponsors, but it's cap-subject — you still face the weighted lottery (~61% per draw at Level IV). Good if you win; have a cap-exempt backup on your list.
Lottery odds assume a STEM candidate.
Personalize to your clock →H-1B wage level
the lottery is wage-weighted — each level is one more entry
$358 more — $140,358 — moves this role to Level IV and 4 lottery entries. That figure is inside the range the employer already advertised.
Based on the DOL prevailing wage for this occupation and worksite, a base salary of $140,358 would place this position at wage Level IV. That figure is within the posted range, and I'd like to target it. This role classifies under "Materials Engineers" for prevailing-wage purposes.
DOL prevailing wage, 2026-27 wage year · Materials Engineers (17-2131) · Boston-Cambridge-Newton, MA-NH. Wage level is derived by USCIS from the offered wage, occupation and worksite; the occupation shown is inferred from the job title.
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Sourced from Department of Labor LCA, PERM and prevailing-wage disclosure data. Employer matching is by name, so figures may be split across an employer's legal entities. Absence of a filing means none appears in our copy of the data, not that none exists.
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About the role
- WHOOP is hiring a Senior Battery Engineer focused on Cell Engineering to evaluate, qualify, and improve lithium-ion cells for current and future products.
- This role is based in the WHOOP office located in Boston, MA.
- Interested in the role, but don't meet every qualification?
Responsibilities
- Evaluate new cell designs, chemistries, form factors, and suppliers against product specifications and acceptance criteria.
- Develop and execute cell qualification plans across incoming and outgoing quality control, performance, safety, reliability, environmental, and life-cycle testing.
- Plan and conduct design of experiments (DOEs) to optimize cells for fit and performance needs.
- Collaborate with battery system engineers to translate cell attributes into pack designs that meet overall product requirements.
- create representative test profiles and analyze electrochemical data.
- Partner with suppliers and cross-functional engineering teams to support process qualification, manufacturing readiness, and battery integration.
- Lead cell-related failure investigations, root cause analysis, and corrective-action verification with suppliers and third-party laboratories.
- Document and communicate qualification results, technical risks, and recommendations through specifications, reports, and design reviews.
- Ability to travel up to 15% domestically and internationally to support supplier visits, factory audits, qualification activities, and failure investigations.
- Operate battery cyclers, environmental chambers, and laboratory equipment; create representative test profiles and analyze electrochemical data.
Requirements
- Bachelor's degree in Chemical Engineering, Materials Science, Mechanical Engineering, or a related field with 5+ years of relevant experience
- or a master's degree or PhD with 2+ years of relevant experience.
- Strong understanding of lithium-ion electrochemistry, cell design, manufacturing processes, and degradation mechanisms.
- Hands-on experience with cell characterization, qualification testing, and battery cyclers such as Arbin, Maccor, or similar systems.
- Experience with Python, MATLAB, Minitab, JMP, or similar tools for data processing, statistical analysis, and visualization.
- Familiarity with cell teardown, cross-sectioning, microscopy, CT scanning, gas analysis, or other advanced failure analysis techniques.
- The successful candidate must be prepared to relocate if necessary to work out of the Boston, MA office.
- Experience analyzing battery data, conducting failure investigations, and developing clear technical recommendations.
- Experience collaborating with battery suppliers, manufacturing partners, and cross-functional product development teams.
- 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 https://www.e-verify.gov/ 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.
Compensation
- 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.
Company info
- At WHOOP, we're on a mission to unlock and inspire performance for life.
- 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.
This listing is sourced directly from Whoop's careers page and normalized into a canonical job model.