Battery Systems Engineer II — Validation & Safety

WHOOP; Boston (MA); On-site; USD 110,000 - 150,000; Full time

Job summary

WHOOP is seeking a Battery Engineer II in Boston to help ensure battery quality, reliability, and performance across our products. You will work with cross‑functional teams, suppliers, and labs to validate next‑generation battery systems through testing, failure analysis, and regulatory compliance.

This hands‑on role emphasizes testing, data analysis, and design improvement throughout the product lifecycle, with opportunities to impact battery technology and documentation standards.

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.
• Strong understanding of lithium‑ion cell design, battery chemistry, 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 topics in cross‑functional settings.
• Understanding of tolerance stack analysis, 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.

Responsibilities

• Develop, execute, and document battery pack, system, and component‑level test plans for 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 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%)

Skills

Battery systems

Lithium‑ion battery development

Lab instrumentation

Technical writing

Cross‑functional communication

Tolerance stack analysis

GD&T

Python data analysis

AI tools awareness

Education

BS/MS in Engineering related to batteries

Tools

Python

Job description

WHOOP is seeking a Battery Engineer II in Boston to help ensure battery quality, reliability, and performance across our products. You will work with cross‑functional teams, suppliers, and labs to validate next‑generation battery systems through testing, failure analysis, and regulatory compliance.

This hands‑on role emphasizes testing, data analysis, and design improvement throughout the product lifecycle, with opportunities to impact battery technology and documentation standards.