Hardware Signal Quality Test Engineer

United States Digital Space LLC; San Francisco (CA); On-site; USD 151,000 - 178,000; Full time

Benefits offered by this job

Health insurance

Equity packages

Employee discounts

Job summary

The company is seeking a Hardware Signal Quality Test Engineer to join the San Francisco team to establish and grow local validation capabilities for Ring sensors. You will perform hands-on testing, analyze sensor data, and communicate actionable results to stakeholders across hardware, firmware, and product quality groups.

Based in San Francisco, this on-site role emphasizes collaboration with testing, hardware engineering, firmware, embedded software, and product quality teams, with occasional

Qualifications

• Bachelor’s degree in Biomedical Engineering, Electrical Engineering, or related field.
• 3+ years hands-on experience in sensor testing, hardware validation, lab measurement or similar.
• Proficiency in Python for data analysis and test tooling.
• Familiarity with analog/digital signal analysis and embedded systems.

Responsibilities

• Contribute to sensor validation cycles for next-generation hardware products and evaluate signal quality across sensor domains.
• Assist test planning and adapt test methods and tools for evaluating physical and physiological signals.
• Analyze sensor data using Python and other data-analysis methods; identify patterns and insights.
• Perform hands-on testing in lab and field environments; support root-cause investigations.
• Deliver data-driven reports to stakeholders to support hardware and product-quality decisions.
• Help establish repeatable sensor-validation practices at the SF site.

Skills

Python

Sensor testing

Hardware validation

Lab measurement

Embedded systems

Data analysis

Communication

Education

Bachelor’s degree in Biomedical or Electrical Engineering

Tools

Python

Test tooling

Lab equipment

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 Hardware Signal Quality Test Engineer to join our San Francisco team. As the company’s first HSQT engineer in San Francisco, you will help establish and grow local validation capability for the company Ring sensors. You will contribute to hardware validation projects, execute hands‑on testing, analyze sensor data, investigate issues, and communicate actionable results. You’ll work within established global processes while helping adapt practical test methods and workflows to the San Francisco lab. You will collaborate closely with testing teams , Science, Hardware Engineering, Firmware and Embedded Software Engineering, and Product Quality.

This is a hybrid position based in San Francisco, Bay Area.

Key Responsibilities

• Contribute to sensor validation cycles for the company’s next‑generation hardware products, executing defined test activities and helping evaluate signal quality across relevant sensor domains.

• Contribute to test planning and adapt test methods and tools to evaluate physical and physiological signals (e.g., motion, optical, electrical, and thermal).

• Analyze sensor data and performance using Python and appropriate data‑analysis methods, identifying patterns and extracting actionable insights.

• Conduct hands‑on testing in the lab and, where appropriate, real‑world field environments; identify unexpected behavior and support root‑cause investigations.

• Deliver clear, data‑driven reports and findings to cross‑functional stakeholders, supporting hardware, algorithms, firmware, and product‑quality decisions.

• Contribute to improvements in test capabilities, documentation, automation, and reporting, helping establish repeatable sensor‑validation practices at the San Francisco site.

QualificationsRequired

• Bachelor’s degree in Biomedical Engineering, Electrical Engineering, a related field, or equivalent practical experience.

• 3+ years of relevant hands‑on experience in sensor testing, hardware validation, laboratory measurement, research, or a related engineering environment.

• Working experience with Python for data analysis, test tooling, or automation; willingness to continue developing these skills.

• Basic familiarity with analog or digital signal analysis and processing.

• Basic understanding of electronics, sensors, or embedded systems.

• Innovative mindset with a strong interest in the latest sensor technologies.

• Proactive and diligent, with the ability to take ownership of scoped work, seek guidance when needed, and communicate results clearly to stakeholders.

• Strong collaboration skills, able to work effectively across disciplines and time zones.

• Excellent problem‑solving abilities and an analytical approach to technical challenges.

• Outstanding written and verbal communication skills.

• Willingness and ability to travel to the company sites and contract manufacturing facilities as needed.

Preferred

• Knowledge of human physiology and physiological signals.

• Experience with electronics and implementing different test fixtures

• Background in hardware testing and debugging, including software interfaces.

• Familiarity with regulatory testing processes for medical or other wearable devices.

Work Model

• Location: Fully on‑site in San Francisco, Bay Area.

• Collaboration with global hardware, firmware, test engineering, and manufacturing teams.

• Occasional travel may be required (to suppliers or Finland).

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.

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

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.

• Region 1: $151,000 - $178,000

A recruiter can determine your zones/tiers based on your US location.

We are not considering candidates residing in the following states: Alaska (AK), Arkansas (AR), Delaware (DE), Iowa (IA), Mississippi (MS), Missouri (MO), Nebraska (NE), Oklahoma (OK), Rhode Island (RI), South Dakota (SD), Vermont (VT), West Virginia (WV), and Wisconsin (WI)

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.

To all recruitment agencies: the company does not accept agency resumes. Please do not forward resumes to our jobs alias, the company employees, or any other organization's location. the company is not responsible for any fees related to unsolicited resumes.