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.