Senior Firmware Engineer Jobs in Missouri (NOW HIRING)

Our mission at Oura is to empower every person to own their inner potential. Our award-winning products help our global community gain a deeper knowledge of their readiness, activity, and sleep quality by using their Oura Ring and its connected app. We've helped millions of people understand and improve their health by providing daily insights and practical steps to inspire healthy lifestyles.

Empowering the world starts with living our values and empowering our team. As a quickly growing company focused on helping people live healthier and happier lives, we ensure that our team members have what they need to do their best work — both in and out of the office.

We are looking for a highly experienced Senior Firmware Engineer with deep expertise in charger architectures, PMIC integration, and battery-powered embedded systems. If you have built product firmware around complex power management and enjoy working at the intersection of hardware and low-level embedded software, this role is for you.

This is a hands‑on individual contributor role within our global Firmware team. You will contribute to power management and charging firmware development across our product portfolio, including both core devices and accessory products. The role spans the full development and device lifetime pipeline—from early prototyping and hardware bring‑up through NPI, mass production, factory support, and long‑term sustaining in the field.

Power management and charging performance are foundational to product reliability and user experience. In this role, your work directly influences battery life, charging behavior, safety, manufacturability, and long‑term durability across multiple product categories—from early development to years in the field.

• Develop power management Firmware: Design, implement, debug, and optimize firmware for battery charging systems, PMIC integration, power sequencing, and charging interfaces across multiple product categories. Ensure solutions meet safety, efficiency, and performance requirements in real‑world conditions.
• Contribute to the Full Power Management Stack: Participate in the development and evolution of the complete power management firmware stack, including low‑power state handling, battery management, charger negotiation, and system‑level power transitions.
• Engage Across the Full Product Lifecycle: Contribute from early architecture discussions and hardware bring‑up through NPI validation, manufacturing ramp, and post‑launch sustaining. Support firmware releases, field issue investigations, and continuous improvements throughout the lifetime of shipped devices.
• Hands‑On Hardware Bring‑Up & Debugging: Work directly with schematics, datasheets, specifications, and lab equipment to implement and debug board‑level and system‑level power and charging designs.
• Develop Low‑Level Drivers & Platform Ports: Implement and maintain device drivers for PMICs, chargers, and related subsystems. Contribute to firmware porting across MCU platforms and firmware update mechanisms to ensure safe and reliable factory and field updates.
• Manufacturing & Factory Support: Develop factory test firmware, contribute to defining manufacturing test specifications, and troubleshoot issues during hardware builds and production ramp.
• Cross‑Functional Collaboration: work closely with hardware, product, program management, and manufacturing teams as a key system level technical contributor in the power and charging domain.
• Optimize for Power and Reliability: Design firmware architectures that balance device performance, power consumption, and user experience, especially for always‑on, battery‑constrained wearable devices.
• Contribute to Strategy: Play a key role in strategic decisions related to firmware architecture and technology stack, aligning with our mission to revolutionize the wearable technology industry.

We would love to consider you for this role if you have:

• 5+ Years of Firmware Development experience:With strong hands‑on development experience in battery‑powered consumer electronics or other high‑volume embedded systems including
  • Significant experience integrating PMICs, battery chargers (switching or linear), fuel gauges, and protection circuits.
  • Strong understanding of charging algorithms, current/voltage regulation, thermal management, and safety mechanisms.
  • Expert‑level C/C++ development in resource‑constrained systems with deep understanding of MCU peripherals, interrupts, power domains, and RTOS‑based systems.
• Battery & Low‑Power Optimization Experience: Demonstrated experience optimizing power states, wake‑up flows, power transitions to maximize battery life, battery qualification processes and development.
• Agile Development Practices: Comfortable working in an agile development environment, with excellent collaboration and communication skills to work effectively with teams across different locations.
• Hardware‑Level Debugging Skills: Comfortable using oscilloscopes, power analyzers, logic analyzers, and other lab tools to root‑cause complex charging and power issues.
• Manufacturing & Production Support Exposure: Experience supporting factory firmware releases, ramp activities, and troubleshooting production issues.
• Strong System‑Level Thinking: Ability to understand interactions between hardware, firmware, and manufacturing processes across the full product lifecycle.
• Education: Bachelor’s or Master’s degree in Electrical Engineering, Computer Science, or related field.

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.

Region 1 (SF): $173,000 - $203,000

Region 2 (SD): $159,000 - $187,0000

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.

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