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# Principal System Test Engineer

- **Company:** Yoh
- **Location:** Chilworth, UK
- **Salary:** £75,000.0 - £85,000.0
- **Contract:** Permanent contract
- **Skills:** 4G (Telecommunication), Automation of Tests, Code Coverage, Continuous Integration, Hardware-In-The-Loop Simulation, Python (Programming Language), Software Engineering, System Testing, Strategies of Testing, Wireless Networks, System-level Testing, Wireless Technologies
- **Published:** August 21, 2026
- **Apply:** https://find.jobs/jobs-near-me/apply/ats-redirect/?id=2936278583-2

## About the Role

* Strong understanding of wireless communications systems, ideally within 4G, 5G, NTN or related technologies.
 * Experience interpreting specifications and translating requirements into practical test methodologies.
 * Python development skills and experience building automated test solutions.
 * Confidence working with RF test equipment and analysing system performance.

You'll Likely Enjoy This Role If

 * You like understanding how systems work, not just whether they work.
 * You enjoy solving technical problems using data, measurements and analysis.
 * You're comfortable working across software, hardware and RF domains.
 * You prefer being involved in defining the test approach rather than simply executing it.

Experience with 3GPP technologies, RF system testing, satellite communications, CI/CD, hardware-in-the-loop environments or wireless infrastructure products would be advantageous.

This role would suit someone who enjoys combining systems thinking, wireless communications and software engineering to solve difficult technical problems.

## Description

Working closely with development, architecture and product teams, you'll define test strategies, develop automated test capability and help ensure complex wireless systems perform as expected in real-world environments.

The Opportunity

 * Define and implement system-level test strategies for advanced wireless communications products.
 * Develop Python-based automated test frameworks and test capability.
 * Work with RF equipment and wireless systems to investigate performance, diagnose issues and validate behaviour.
 * Collaborate with engineers, architects and customers to translate requirements into meaningful test coverage.


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