Principal System Test Engineer

Yoh; Chilworth; Hybrid; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Bonus

Benefits

Job summary

Yoh is seeking a Principal System Test Engineer in Southampton, offering hybrid working, a competitive salary, bonus and benefits. You will bridge specification, architecture and real-world performance, defining test strategies and building automated test capabilities for advanced wireless systems.

You’ll work closely with development, architecture and product teams to translate requirements into meaningful test coverage and ensure complex wireless systems behave as expected in real environments.

Qualifications

• Interpret specifications to define practical test methods.
• Develop Python-based automated test capabilities.
• Experience using RF test equipment for performance analysis.
• Knowledge of 3GPP technologies is advantageous.

Responsibilities

• Define system-level test strategies for wireless products.
• Build and maintain Python automated test frameworks.
• Investigate performance with RF equipment and diagnose issues.
• Collaborate with engineers to translate requirements into test coverage.

Skills

Python

Test Automation

RF testing

5G/4G

System test

Tools

CI/CD

Job description

Principal System Test Engineer

Southampton | Hybrid Working Competitive Salary + Bonus + Benefits

Not all test roles are created equal.

Some involve executing test plans that somebody else has written.

This isn't one of them.

We're working with a company developing advanced 5G and satellite communications technology. They're looking for a Principal System Test Engineer who can bridge the gap between specification, system architecture and real-world performance.

You’ll be the person asking:

"How should this system behave?"

not simply:

"Did it pass the test?"

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.

What We're Looking For

• 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.

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.

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.

About Yoh

Yoh are a global talent and outsourcing specialist, partnering with businesses ranging from innovative start-ups through to some of the world's largest technology organisations