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Modem System Test Engineer Jobs in California (NOW HIRING)

Zoox

System Test Engineer

Foster City, CA

$150K - $186K/yr

Zoox is seeking a highly motivated System Test Engineer to be a technical contributor supporting the System Integration and Validation team. You will be leading the integration and validation of ...

Qualcomm

#Systems Test Engineer

Santa Clara, CA · On-site

Location Technology System Test Engineer Tests and validates location technology systems spanning ... modem (WWAN), WLAN, sensors, middleware, and application layers. * Designs and executes test plans ...

AeroVironment

System Test Engineer III

Moorpark, CA

$100K - $153K/yr

Worker Type Regular Summary The System Test Engineer III develops and executes System Test Plans for small, unmanned air vehicles and missiles and their associated subsystems. Testing encompasses ...

AeroVironment, Inc.

System Test Engineer III

Moorpark, CA · On-site

$100K - $153K/yr

Worker Type Regular Summary The System Test Engineer III develops and executes System Test Plans for small, unmanned air vehicles and missiles and their associated subsystems. Testing encompasses ...

Qualcomm

#Systems Test Engineer

Santa Clara, CA · On-site

The role involves executing system-level test plans, analyzing logs and data, and collaborating ... modem (WWAN), WLAN, sensors, middleware, and application layers. • Designs and executes test ...

Saige Partners

Wireless Test Engineer

San Diego, CA

$65 - $80/hr

We are seeking a Wireless Modem Test Engineer to support the validation, testing, and optimization of 5G/4G modem technologies This role will focus on interoperability testing (IOT), feature ...

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Modem System Test Engineer information

What is the difference between Modem System Test Engineer vs Modem Firmware Engineer?

AspectModem System Test EngineerModem Firmware Engineer
Primary FocusTesting and validation of modem systems and hardwareDeveloping and optimizing modem firmware and software
Required SkillsTesting methodologies, hardware troubleshooting, knowledge of communication protocolsEmbedded programming, firmware development, C/C++ skills
Work EnvironmentTesting labs, hardware integration environmentsSoftware development environments, embedded systems
Common CertificationsISTQB, hardware testing certificationsEmbedded systems certifications, C programming certifications

While both roles involve working with modems, the Modem System Test Engineer primarily focuses on testing and validating hardware and system performance, whereas the Modem Firmware Engineer concentrates on developing and maintaining the firmware that runs on modems. Both roles are essential in the modem development lifecycle and often collaborate closely.

What are Modem System Test Engineers?

Modem System Test Engineers are professionals who design, develop, and execute tests to ensure the reliability and performance of modem systems, which enable wireless communication in devices such as smartphones and IoT gadgets. They work with hardware and software teams to identify, troubleshoot, and resolve issues related to connectivity, data transmission, and network compatibility. Their responsibilities often include automating test cases, analyzing logs, and validating modem features against industry standards. This role is crucial in ensuring that wireless products deliver high-quality user experiences and comply with regulatory requirements.

What are the typical challenges faced by a Modem System Test Engineer when working with new device releases?

Modem System Test Engineers often encounter challenges related to ensuring compatibility and performance across a wide range of networks and devices, especially during new device launches. Rapidly evolving hardware and software can introduce unexpected bugs, requiring thorough regression and exploratory testing. Additionally, collaborating with cross-functional teams, such as development, QA, and carrier partners, is essential to address integration issues and meet tight project deadlines. Staying adaptable and maintaining clear communication are key to overcoming these obstacles.
What are popular job titles related to Modem System Test Engineer jobs in California? For Modem System Test Engineer jobs in California, the most frequently searched job titles are:
What job categories do people searching Modem System Test Engineer jobs in California look for? The top searched job categories for Modem System Test Engineer jobs in California are:
Modem System Test Engineer jobs near you
Infographic showing various Modem System Test Engineer job openings in California as of July 2026, with employment types broken down into 90% Full Time, 6% Part Time, and 4% Contract. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution.

System Test Engineer

Zoox

Foster City, CA

$150K - $186K/yr

Full-time

Medical, Life, PTO

Posted 19 days ago

Job description

Autonomous vehicles have some of the largest, most complex software ever shipped in a safety-critical environment. Solving that problem is one of the most exciting technical challenges of our lifetime.
 
Zoox is seeking a highly motivated System Test Engineer to be a technical contributor supporting the System Integration and Validation team. You will be leading the integration and validation of autonomy, cloud, and operational elements to ensure the product meets safety, customer needs, and milestone readiness. You will be responsible for designing and developing test efforts at the highest level of integration, including feature validation, functional, and regression testing, toward the successful execution and reporting of these efforts.
 
In this role, you will:
  • Develop test plans and test cases that are abstracted to the highest level of integration
  • Focus on automating testing utilizing internal Hardware in the Loop (HIL) and Software in the Loop (SIL) assets
  • Review data, collect metrics, and provide quantitative evidence to report on milestone readiness
  • Analyze vehicle logs and test data using in-house tools to trace failures for root cause analysis, documentation, and communication
  • Support the defect management process from recognition to resolution
Qualifications:
  • Bachelor's or Master's degree in Computer Science, Aerospace Engineering, Electrical Engineering, or STEM-related field
  • 3+ years of industry experience in testing complex systems (integration of cloud tools, cloud and cloud networking, mobile applications, application UI, and operational workflows)
  • Experience with designing, developing, and executing test methodologies that scale across multiple teams
  • Strong software development experience with high-level language (e.g. Python, Pytest, REST API), along with version control systems (e.g Git) 
  • Integrated systems troubleshooting experience
Bonus Qualifications:
  • Experience with Hardware in the Loop (HIL) and/or Software in the Loop (SIL)
  • Experience with issue reporting tools (e.g. Jira, Azure Dev Ops)
  • Experience with Linux and Unix based systems
$150,000 - $186,000 a year
Base Salary Range
 
There are three major components to compensation for this position: salary, Amazon Restricted Stock Units (RSUs), and Zoox Stock Appreciation Rights. A sign-on bonus may be offered as part of the compensation package. The listed range applies only to the base salary. Compensation will vary based on geographic location and level. Leveling, as well as positioning within a level, is determined by a range of factors, including, but not limited to, a candidate's relevant years of experience, domain knowledge, and interview performance. The salary range listed in this posting is representative of the range of levels Zoox is considering for this position.
 
Zoox also offers a comprehensive package of benefits, including paid time off (e.g. sick leave, vacation, bereavement), unpaid time off, Zoox Stock Appreciation Rights, Amazon RSUs, health insurance, long-term care insurance, long-term and short-term disability insurance, and life insurance.
About Zoox
Zoox is developing the first ground-up, fully autonomous vehicle fleet and the supporting ecosystem required to bring this technology to market. Sitting at the intersection of robotics, machine learning, and design, Zoox aims to provide the next generation of mobility-as-a-service in urban environments. We're looking for top talent that shares our passion and wants to be part of a fast-moving and highly execution-oriented team.

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Accommodations
If you need an accommodation to participate in the application or interview process please reach out to [email protected] or your assigned recruiter.

A Final Note:
You do not need to match every listed expectation to apply for this position. Here at Zoox, we know that diverse perspectives foster the innovation we need to be successful, and we are committed to building a team that encompasses a variety of backgrounds, experiences, and skills.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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