Senior Software Tester (Python)

Role: Senior Software Tester Salary: to £70,000 per annum, depending on experience Location: predominantly remote, occasional visits to Farnborough

We're hiring a Senior Software Tester to take the lead on testing strategy across sophisticated mobile and device-based systems. This is a high-impact position where you'll go beyond day-to-day testing, helping to define frameworks, influence technical direction and champion best practice across engineering teams.

You will be working in a complex, non-deterministic environment where system behaviour is not always predictable. This means you will play a key role in designing intelligent, resilient testing approaches that can handle variability, uncover edge cases and ensure consistent performance under real-world conditions.

If you're someone who thrives on solving complex problems, enjoys working at the intersection of hardware and software, and wants to raise the bar for quality, this could be the perfect move.

You'd be working in a predominantly remote environment, with occasional visits to head office in Farnborough.

Security Clearance: eligible for Security Check ("SC Clearance") + sole UK national

This is a full-time permanent Senior Software Tester position, paying up to £70,000 per annum, depending on experience.

Skills and experience required:

We're looking for a technically strong, quality-focused professional who enjoys both hands-on delivery and strategic input.

• Strong Python skills, particularly for automation and scripting
• Proven experience testing mobile devices and managing test environments
• Experience working with or testing non-deterministic systems, with the ability to design robust test strategies for unpredictable outcomes
• A track record of improving testing processes or defining automation strategies
• Understanding of firmware lifecycles (deployment, updates, version control)
• Experience working with CI/CD pipelines and modern development tooling
• Solid knowledge of iOS and Android ecosystems
• Strong analytical and troubleshooting skills, especially across complex and variable device interactions
• Confident communicator, with the ability to mentor and support others

What you'd be doing:

In this senior, hands-on role, you'll play a key part in driving quality and continuous improvement:

• Build and maintain Python-based automation frameworks
• Manage and optimise mobile testing environments
• Design and implement testing approaches suitable for non-deterministic systems, ensuring reliability despite unpredictable behaviour
• Define and deliver firmware testing and rollout strategies
• Lead both manual and automated testing activity
• Collaborate closely with engineering teams to support releases and improve product quality
• Analyse test outcomes, including inconsistent or non-repeatable results, and provide clear, actionable insights
• Mentor junior team members and embed best practices
• Enhance tools, processes and documentation across the test function
• Monitor and report on coverage, usage and performance metrics

Eligibility and security requirements

Due to the nature of the work:

• You must be a sole UK national
• You must be eligible and willing to undergo SC Clearance
• You must have the right to work in the UK without sponsorship

Benefits:

• Competitive salary based on experience up to £70,000
• Pension contribution
• Healthcare package
• Bonus scheme
• Ongoing learning and development opportunities

If you're interested, then we'd love to hear from you - please Apply Now and send a CV for quick review.

Should you require reasonable adjustments at any point during the recruitment process or if there is a better way for us to communicate, please do let us know.

Software Tester, Senior Tester, Test Lead, Python, Automation

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