Senior Manufacturing Test Engineer

United States Digital Space LLC; San Diego (CA); Hybrid; USD 150,000 - 187,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Mental health resources

Paid time off

Job summary

United States Digital Space LLC is seeking a Senior Manufacturing Test Engineer to lead test strategy, development, and deployment for production testing of wearable-related devices. The role partners with hardware, firmware, operations and external contract manufacturers to ensure scalable, high‑quality test processes.

You will own test architecture, develop test software, analyze production data, and drive yield improvements across the product lifecycle.

Qualifications

• 7+ years in manufacturing/test engineering or automation.
• Hands-on experience developing manufacturing test software in Python, C, C++, Rust.
• Experience with development builds and mass production with global partners.

Responsibilities

• Design for Testability (DFT) to enable robust testing.
• Own test engineering across POC/Proto/EVT/DVT/PVT and mass production.
• Develop/maintain test software and automation in Python, C, C++, Rust.

Skills

Test software development

Python

C/C++

Rust

Education

Bachelor/Master in Mechanical or Electrical Engineering

Tools

Test stations design

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 seeking a Senior Manufacturing Test Engineer to lead the end to end test strategy, development, and deployment of production test solutions for the company products. This role partners closely with cross functional teams and global contract manufacturers to ensure scalable, reliable, and high quality manufacturing test processes.

As a Senior Manufacturing Test Engineer, you will own the design, development, and optimization of manufacturing test solutions across the full product lifecycle, from early concept through mass production. You will serve as a technical lead responsible for defining test architecture, developing and maintaining test software, supporting contract manufacturer execution, leveraging data to drive insights, and leading ongoing quality and yield improvements.

This position requires strong hands on engineering capability, systems level thinking, and the ability to work effectively across hardware, firmware, operations, quality, and external manufacturing partners.

This is a hybrid position that requires 3 days a week in either our San Francisco or San Diego office.What you will do:

Design for Testability (DFT)

• Drive early and ongoing manufacturing involvement to ensure products are designed for robust, scalable, and cost-effective testing.

• Partner with Hardware, Systems, and Product teams to define test requirements aligned to product specifications and quality targets

• Incorporate DFMEA / PFMEA, Engineering Specifications, and test coverage analysis into product design

Product Lifecycle & Manufacturing Support

• Own test engineering across all phases: POC/Proto/EVT/DVT/PVT, ramp, and mass production

• Provide hands-on production support for complex test issues, yield excursions, and systemic failures

• Lead test readiness reviews and production gate decisions with Operations and CM partners

Test Process & Software Development

• Architect, design, and deploy manufacturing test stations and processes

• Develop and maintain test software and automation in Python, C, C++, Rust including:

• Instrument control

• Data acquisition and logging

• Test sequencing and error handling

• Factory dashboards and analytics hooks

• Drive modular, scalable, and maintainable test software frameworks suitable for high-volume manufacturing

Statistical & Data-Driven Engineering

• Apply statistical tools such as GR&R, SPC, Cp/Cpk, correlation analysis, and DOE

• Ensure test processes and fixtures meet capability, repeatability, and scalability requirements

• Analyze production data to identify trends, root causes, and improvement opportunities

Failure Analysis & Continuous Improvement

• Lead failure analysis efforts across test stations, products, and manufacturing processes

• Close test gaps and correlation issues across internal labs and external factories

• Improve product quality, yield, and cost through systematic test optimization

Contract Manufacturer (CM) Leadership

• Act as the primary technical interface to Contract Manufacturers and test equipment vendors

• Drive CM test development, qualification, deployment, and sustaining

• Lead issue resolution related to tester hardware, software, fixtures, and factory execution

• Provide technical direction, training, and mentorship to CM teams and automation suppliers

Cross-Functional & Executive Communication

• Collaborate closely with Hardware, Firmware, Quality, Operations, Supply Chain, and Program teams

• Prepare and present clear, concise test engineering status updates to leadership and executive stakeholders

• Influence decisions through data, technical depth, and operational insight

We would love to have you on our team if you have:

• 7 + years of experience in manufacturing engineering, test engineering, or automation (assembly, inspection, test station design, or factory deployment)

• Hands-on experience developing manufacturing test software in Python, C, C++, Rust

• Bachelor’s or Master’s degree in Mechanical Engineering, Electrical Engineering, or related discipline

• Experience supporting development builds and mass production with global manufacturing partners

• Willingness to travel 25% across domestic and international factory sites

• Experience working with wearables, consumer electronics, sensors, or embedded systems

• Strong background in test station qualification and correlation (calibration, GR&R, Cp/Cpk, DOE)

• Experience working cross-functionally with hardware, firmware, systems, quality, and operations teams

• Familiarity with optical, RF, or semiconductor-based test methodologies

• Proven ability to operate effectively in a global, fast-paced manufacturing environment

• Excellent written and verbal communication skills across cultures and time zones

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 (San Francisco) $162,000- $203,000

• Region 2 (San Diego) $150,000- $187,000

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