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Boston MA USA
Hybrid
Senior level
Fitness • Hardware • Healthtech • Sports • Wearables
Power your performance with 24/7 data
The Role
Lead design qualification and lifecycle sustainment of lithium-ion battery systems for WHOOP wearables. Serve as technical lead across teams and suppliers; drive cell design BMS/fuel gauge optimization testing (DOE) validation failure analysis regulatory compliance (UL/CE/IEC) field quality and mentoring. Manage timelines supplier qualification and battery predictive modeling using machine learning.
Summary Generated by Built In
Senior Battery Engineer (Full-Time)
Boston MA
Boston MA
Duties:
Lead the design qualification and lifecycle sustainment of lithium-ion battery systems that
power WHOOP’s advanced wearable technology. This role is critical to achieving the highest
levels of energy density reliability and safety in compact high-performance form factors. Serve
as the technical lead for WHOOP’s battery systems driving development across internal
engineering teams and external partners. Drive innovation in cell design and integration to
support long-lasting compact energy systems that meet WHOOP’s demanding performance
standards. Own the batteries subsystem and ensure optimal reliability and safety under real-
world use conditions. Collaborate with electrical mechanical firmware reliability and quality
engineers to optimize battery system performance in a multidisciplinary development
environment. Lead the creation and execution of test plans including Design of Experiments
(DOE) performance validation and root cause failure analysis for battery-related issues.
Evaluate and qualify battery suppliers and manufacturing partners ensuring alignment with
WHOOP’s product standards and regulatory requirements. Maintain organized documentation
for test results field performance data and compliance with international safety and regulatory
standards (UL CE IEC). Ensure WHOOP’s battery systems meet or exceed global safety and
certification benchmarks supporting regulatory filings as needed. Conduct field quality
assessments and lead corrective actions for battery-related concerns. Mentor junior engineers and
contribute to technical roadmaps for future product innovation. Manage battery subsystem
development timelines and cross-functional team coordination to ensure on-time delivery of new
and sustained battery technologies. Work with firmware and Electrical engineers to develop and
optimize the fuel gauge and battery management system for the WHOOP line of products.
power WHOOP’s advanced wearable technology. This role is critical to achieving the highest
levels of energy density reliability and safety in compact high-performance form factors. Serve
as the technical lead for WHOOP’s battery systems driving development across internal
engineering teams and external partners. Drive innovation in cell design and integration to
support long-lasting compact energy systems that meet WHOOP’s demanding performance
standards. Own the batteries subsystem and ensure optimal reliability and safety under real-
world use conditions. Collaborate with electrical mechanical firmware reliability and quality
engineers to optimize battery system performance in a multidisciplinary development
environment. Lead the creation and execution of test plans including Design of Experiments
(DOE) performance validation and root cause failure analysis for battery-related issues.
Evaluate and qualify battery suppliers and manufacturing partners ensuring alignment with
WHOOP’s product standards and regulatory requirements. Maintain organized documentation
for test results field performance data and compliance with international safety and regulatory
standards (UL CE IEC). Ensure WHOOP’s battery systems meet or exceed global safety and
certification benchmarks supporting regulatory filings as needed. Conduct field quality
assessments and lead corrective actions for battery-related concerns. Mentor junior engineers and
contribute to technical roadmaps for future product innovation. Manage battery subsystem
development timelines and cross-functional team coordination to ensure on-time delivery of new
and sustained battery technologies. Work with firmware and Electrical engineers to develop and
optimize the fuel gauge and battery management system for the WHOOP line of products.
Requirements:
Bachelor’s degree in Chemical Mechanical or Electrical Engineering or related technical field
(or foreign degree equivalent) and 5 years of experience with battery system design failure
analysis or sustaining engineering. Will also accept a Master’s degree in Chemical Mechanical
or Electrical Engineering or related technical field (or foreign degree equivalent) and 2 years of
experience with battery system design failure analysis or sustaining engineering. Required
Skills: At least 2 years of experience with Lithium-Ion Cell design and battery chemistry; At
least 2 years of experience leading cross-functional engineering projects and communicating
complex technical issues to diverse stakeholders; At least 2 years of experience using Python or
similar scripting tools for test data analysis and visualization; At least 2 years of experience with
machine learning methods and data science tools for battery predictive modeling; At least 2 years
of experience with running battery test equipment (Arbin or Maccor) and battery test
fixture/DOE development.
(or foreign degree equivalent) and 5 years of experience with battery system design failure
analysis or sustaining engineering. Will also accept a Master’s degree in Chemical Mechanical
or Electrical Engineering or related technical field (or foreign degree equivalent) and 2 years of
experience with battery system design failure analysis or sustaining engineering. Required
Skills: At least 2 years of experience with Lithium-Ion Cell design and battery chemistry; At
least 2 years of experience leading cross-functional engineering projects and communicating
complex technical issues to diverse stakeholders; At least 2 years of experience using Python or
similar scripting tools for test data analysis and visualization; At least 2 years of experience with
machine learning methods and data science tools for battery predictive modeling; At least 2 years
of experience with running battery test equipment (Arbin or Maccor) and battery test
fixture/DOE development.
Skills Required
- Bachelor's degree in Chemical Mechanical or Electrical Engineering (or foreign equivalent) and 5 years of experience in battery system design failure analysis or sustaining engineering
- Master's degree in Chemical Mechanical or Electrical Engineering (or foreign equivalent) and 2 years of experience in battery system design failure analysis or sustaining engineering
- At least 2 years of experience with lithium-ion cell design and battery chemistry
- At least 2 years of experience leading cross-functional engineering projects and communicating complex technical issues
- At least 2 years of experience using Python or similar scripting tools for test data analysis and visualization
- At least 2 years of experience with machine learning methods and data science tools for battery predictive modeling
- At least 2 years of experience running battery test equipment (Arbin or Maccor) and developing battery test fixtures/DOE
What the Team is Saying
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WHOOP Compensation & Benefits Highlights
- Wellbeing & Lifestyle Benefits—Wellness support includes a stipend and a complimentary WHOOP membership to use and gift aligning perks with the company’s health focus. Feedback suggests these lifestyle benefits are a meaningful part of total rewards.
- Healthcare Strength—Core coverage spans medical dental vision mental health services and life and disability insurance. This breadth indicates a comprehensive health safety net.
- Equity Value & Accessibility—Total rewards commonly include stock options or equity participation positioning ownership as part of compensation. Feedback suggests equity is viewed as a valuable component of the package.
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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.
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Employees engage in a combination of remote and on-site work.
Typical time on-site: 4 days a week
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