Senior Battery Design Engineer

At Oura, our mission is to empower every person to own their inner potential. With our award-winning Oura Ring and app, we help over 2.5 million people turn insights about sleep, activity, and readiness into healthier, more balanced lives. We believe that starts from within — by creating a culture where our team feels supported, included, and inspired to do their best work. Oura Values guide how we show up for each other and our community every day We are seeking a Senior Battery Design Engineer to join our Hardware Engineering team. In this role, you will drive the design, development, and validation of advanced battery systems tailored for compact wearable devices. You will serve as a technical subject matter expert, collaborating closely with internal teams and external vendors to ensure our battery solutions deliver the safety, reliability, and performance our users expect — at scale. This is a hybrid role in our San Francisco office.  What You’ll Do Battery Design & Integration Lead the design, selection, and integration of batteries into wearable products, balancing safety, form factor, energy density, and manufacturability. Define and maintain product-level specifications for battery performance, reliability, and lifetime. Work hands-on with prototypes and production samples to validate and optimize battery integration. Testing, Validation & Failure Analysis Develop and execute rigorous test and qualification protocols across environmental, mechanical, and usage scenarios. Partner with reliability engineering to establish lifecycle and safety test standards. Lead root cause analysis of battery-related failures and drive corrective actions through vendors and internal teams. Vendor & Cross-Functional Collaboration Collaborate with supply chain and operations teams to qualify and manage battery cell and pack vendors, with a focus on Asia-based suppliers. Work closely with electrical, mechanical, firmware, and systems engineers to ensure seamless integration and performance. Provide guidance to cross-functional teams on best practices for battery handling, testing, and integration. 15-20% Travel Required to our key suppliers throughout Europe and Asia Technology Roadmap & Strategy Stay ahead of emerging battery technologies and assess their applicability to Oura’s products. Influence long-term product architecture by aligning battery capabilities with product and design requirements. Act as Oura’s internal subject matter expert on battery chemistry, safety, and packaging trends. Requirements Bachelor’s or Master’s degree in Electrical Engineering, Materials Science, Chemical Engineering, or related field. 5+ years of experience in battery design and integration for consumer electronics or similarly high-volume, compact devices. Deep expertise in battery technologies, including chemistry, construction, safety, and packaging, with experience in Li-ion and emerging chemistries. Hands-on experience collaborating directly with battery cell and pack vendors, particularly in Asia. Familiarity with battery management systems (BMS), protection circuits, and system-level integration. Demonstrated success defining and meeting battery-level and product-level reliability, safety, and lifetime goals. Proven ability to lead failure analysis and implement corrective actions. Excellent communication skills and ability to work effectively in cross-functional and international teams. Benefits Benefits At Oura, we care about you and your well-being. Everyone here at Oura has a ring of their own and we are continually looking to improve employee health. What we offer: Competitive salary and equity packages Health, dental, vision insurance, and mental health resources An Oura Ring of your own plus employee discounts for friends & family 20 days of paid time off plus 13 paid holidays plus 8 days of flexible wellness time off Paid sick leave and parental leave Oura takes a market-based approach to pay, which may vary depending on your location. US locations are categorized into tiers based on a cost of labor index for that geographic area. While most offers will be closer to the starting range, successful candidates' pay will be determined based on job-related skills, experience, qualifications, work location, internal peer equity, and market conditions. These ranges may be modified in the future. San Francisco/Bay Area: $162,000 - $203,000 Oura is proud to be an equal opportunity workplace. We celebrate diversity and are committed to creating an inclusive environment for all employees. Individuals seeking employment at Oura are considered without regard to age, ancestry, color, gender (including pregnancy, childbirth, or related medical conditions), gender identity or expression, genetic information, marital status, medical condition, mental or physical disability, national origin, protected family care or medical leave status, race, religion (including beliefs and practices or the absence thereof), sexual orientation, military or veteran status, or any other characteristic protected by federal, state, or local laws. We will not tolerate discrimination or harassment based on any of these characteristics. We will work to ensure individuals with disabilities are provided reasonable accommodation to participate in the interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Disclaimer: Beware of fake job offers! We’ve been alerted to scammers posing as ŌURA recruiters, especially for remote roles. Please note: Our jobs are listed only on the ŌURA Careers page and trusted job boards We will never ask for personal information like ID or payment for equipment upfront Official offers are sent through Docusign after a verbal offer, not via text or email Stay cautious and protect your personal details To all recruitment agencies: Oura does not accept agency resumes. Please do not forward resumes to our jobs alias, Oura employees, or any other organization's location. Oura is not responsible for any fees related to unsolicited resumes.