Senior Hardware Test Engineer

Our mission at the company 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 the company 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 Senior Hardware Test Engineer to design, build, and maintain test infrastructure and tooling that supports engineers through electrical bring-up, debug, and validation across the product development lifecycle. This role works closely with hardware, firmware, and reliability teams to ensure test systems and data enable fast iteration and high confidence in electrical performance ahead of production, while helping ensure test knowledge translates effectively into production when needed.

• Develop and maintain development-phase tests using Python, including test automation, data collection, and result validation

• Implement test logic that interfaces with hardware communication protocols such as UART and BLE

• Build and maintain tooling that supports engineers' development, validation, and debug workflows

• Collaborate with manufacturing and quality teams to help ensure test knowledge translates effectively into production

• Support electronics component- and subsystem-level testing during bring-up and early development

• Debug and validate issues across hardware, firmware, and test infrastructure boundaries

• Read and interpret electronic component datasheets, specifications, and application notes

• Convert component requirements and datasheet limits into clear, repeatable, and automated test cases suitable for engineering validation

• Ensure test coverage reflects real electrical, timing, and protocol requirements, not just functional pass/fail

This is an hybrid US based role out of our San Francisco office.

• 5+ years of experience in infrastructure engineering, systems engineering, or a related technical role

• Practical understanding of hardware communication interfaces and protocols (e.g. UART, BLE)

• Experience supporting or developing tests for electronic components or embedded systems

• Ability to read and understand electronic component datasheets and translate specifications into test requirements

• Comfortable working close to hardware, including bring-up, debugging, and failure analysis

• Hands-on experience designing, deploying, and maintaining infrastructure systems in engineering or lab environments

• Experience supporting infrastructure for data-intensive or test-driven environments

• Ability to troubleshoot complex technical systems and perform structured root-cause analysis

• Strong collaboration and communication skills, with the ability to work across multiple engineering disciplines

• Self-motivated, detail-oriented, and comfortable working in a fast-paced environment

• Fluent written and spoken English

• Experience testing low-power or wearable devices

• Experience developing tests that validate electrical, timing, and protocol-level behavior

• Experience supporting infrastructure for hardware development or test environments

• Exposure to manufacturing or factory test environments a plus

• Bachelor's or Master's degree in Computer Engineering, Electrical Engineering, Systems Engineering, or a related field

• Close collaboration with the company's global hardware, firmware, reliability testing, and quality teams

• Occasional travel to supplier locations or Finland required

At the company, we care about you and your well-being. Everyone here at the company has a ring of their own and we are continually looking to improve employee health and add to our benefits!

What we offer:

• Competitive salary and equity packages

• Heal…