Senior Hardware Test Engineer

United States Digital Space LLC; San Francisco (CA); Hybrid; USD 172,000 - 203,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Mental health resources

15–20 days PTO and holidays

Job summary

United States Digital Space LLC is seeking a Senior Hardware Test Engineer for designing, building, and maintaining test infrastructure across the product lifecycle. You will work with hardware, firmware, and reliability teams to ensure fast iteration and high confidence in electrical performance ahead of production.

The role emphasizes test development, protocol-level testing, and translating specifications into automated tests, with a hybrid US-based position in San Francisco.

Qualifications

• 5+ years of experience in infrastructure or systems engineering
• Practical understanding of hardware interfaces and protocols (UART, BLE)
• Experience developing tests for electronic components or embedded systems
• Ability to read 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 data-intensive or test-driven environments
• Strong collaboration and communication skills across disciplines
• Self-motivated, detail-oriented in a fast-paced setting
• Fluent written and spoken English

Responsibilities

• 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 translate test knowledge 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 repeatable test cases for engineering validation
• Ensure test coverage reflects real electrical, timing, and protocol requirements beyond simple pass/fail

Skills

Infrastructure engineering

Systems engineering

Hardware interfaces

Embedded testing

Debug & failure analysis

Test infrastructure

Python

Communication

Education

Bachelor's or Master's in Computer Eng/Electrical Eng/Systems Eng

Tools

Python

Job description

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.

What you will do:

Test development & coding

• 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

Hardware & protocol-level testing

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

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

Translating specifications into tests

• 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.

Requirements

• 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

Preferred

• 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

Work Model

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

• Occasional travel to supplier locations or Finland required

Benefits

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

• Health, dental, vision insurance, and mental health resources

• An the company 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

• Amazing culture of collaborative and passionate coworkers

the company 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.

• $172,000 - $203,000

the company 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 the company 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.