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Modem System Test Engineer Jobs in California (NOW HIRING)

Qualcomm

Modem Integration & Test Engineer

San Diego, CA · On-site

$89K - $133K/yr

Engineering Group, Engineering Group > Cellular System Test Engineering General Summary: As a member of the Modem SW Image Integration & Test (I&T) team, you will be responsible for the integration ...

Viasat, Inc.

System Test Engineer

Carlsbad, CA · On-site

$117K - $176K/yr

... modem! Write test documentation include test plans, procedures and test cases and then support lab ... Communicate with a multi-functional development engineering team to fix integration and system ...

Viasat, Inc.

System Test Engineer

Carlsbad, CA · On-site

$117K - $176K/yr

... modem! Write test documentation include test plans, procedures and test cases and then support lab ... Communicate with a multi-functional development engineering team to fix integration and system ...

TAE

System Test Engineer

Irvine, CA · On-site

The System Test Engineer is responsible for the development, maintenance, and execution of test cases to support Design Verification, Design Validation, and Usability Engineering activities for ...

TAE Life Sciences

System Test Engineer

Irvine, CA · On-site

The System Test Engineer is responsible for the development, maintenance, and execution of test cases to support Design Verification, Design Validation, and Usability Engineering activities for ...

TAE

Senior System Test Engineer

Irvine, CA · On-site

The System Test Engineer is responsible for the development, maintenance, and execution of test cases to support Design Verification, Design Validation, and Usability Engineering activities for ...

AeroVironment

System Test Engineer II

Moorpark, CA · On-site

The LMS HIL/SIL System Test Engineer II supports the tactical and strategic technology roadmap by ensuring comprehensive test coverage, verifying and validating system requirements, identifying ...

General Atomics

System Test Engineer

Poway, CA · On-site

We have an exciting opportunity to join our team as a System Development & Test (SD&T) Engineer. This position is located at our Poway, CA location supporting test and evaluation engineering ...

Nvidia

System Test Engineer

Santa Clara, CA · On-site

We are looking to hire a Senior System Test Engineer with a strong background in embedded and automotive systems who will work in the test solutions group at NVIDIA developing manufacturing test ...

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 ...

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Modem System Test Engineer information

What is a modem system test engineer?

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 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 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 August 2026, with employment types broken down into 11% Internship, 67% Full Time, and 22% Contract. Highlights an 100% In-person job distribution.

Modem System Test Engineer

Wise Equation Solutions Inc.

Foster City, CA • On-site

Other

Re-posted 10 days ago

Job description

Job Description & Skill Requirement:

  • The Modem System Test Engineer will analyze wireless performance for various use-cases for Zoox Applications in telematics domain.
  • Collect and process test data for issue debugging with modem logs. Develop, document, execute & debug system-level validation tests for network-connected devices. This includes mission-critical 4G-LTE, 5G-NR, Wi-Fi, and GNSS wireless interfaces, integrated with Zoox''s on-vehicle and cloud-based networks.
  • Collaborate with FW engineers to ensure performance meets quality of service targets and other key metrics including throughput, latency, and jitter.
  • Hands-on to develop test cases and execute test frameworks for prototypes and commercial system releases as well as conduct tests in the field, ensuring network compliance with international regulations.
  • We seek an expert, enthusiastic, innovative, and self-starting individual to join our team.

 

Required Skills:

  • Modem log analysis and triaging for telematics domain.
  • Analyze 4G-LTE, 5G-NR, Wi-Fi, GNSS, Ethernet, and IP behavior internally and with partners.
  • Identify root causes of failures, whether found internally or externally. 
  • Collaborate with Modem Vendor to discuss technical issues and drive them to closure. 
  • Be hands-on and explore opportunities for improvement, relying on diagnostics, analytics, and lab/test equipment experiments. 
  • Generate Documentation - Draft and present Test Plans, Design Reviews, Test Readiness Reviews, and Data Reviews.
  • Review and provide feedback on test plans and reports from suppliers. 
  • Develop Test Infrastructure - Select, procure, commission, and configure test cases on network emulators and related test equipment supplied by vendors such as Keysight or Rohde & Schwarz.
  • Develop custom test assets, setups, and scripts to enable efficient testing, including scripts using Python and TTCN. 
  • Construct and maintain lab infrastructure, from fixed network test harnesses to RF c.
  • Automotive experience is a plus.

 

Qualification:
B.S. in Electrical Engineering, Telecommunications, E&C

Feel free to reach out in case of any queries or clarifications.

Looking forward to your prompt response.

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