Junior Software Tester jobs in United Kingdom

Software Test Engineer - Systems Integration & Validation
Hybrid working - 3-4 days on-site
42,000 - 50,000

We have an exciting opportunity to join the Integration & Systems Validation Team within our Weapon Systems Simulation & Experimentation (WSSE) department.

This team sits at the heart of our digital simulation and experimentation capability, ensuring complex systems are rigorously tested, validated, and ready for delivery. You'll work on cutting‑edge simulation environments that integrate real products, models, synthetic environments, and people across the full systems lifecycle.

This is a dynamic, fast‑paced role offering exposure to both rapid mini‑projects and longer‑term critical programmes, from early concept demonstration through to system delivery and customer training.

Reporting to the ISV Team Lead, you'll be responsible for the end-to-end software testing and proving lifecycle for one or more products within a simulation or emulation environment.

• Understand customer needs and requirements from a testing and proving perspective
• Review system design and architecture to define test bed requirements
• Develop comprehensive software test plans, designs, and specifications

• Conduct progressive assurance testing throughout the development lifecycle
• Lead technical investigations into software defects and emergent behaviours
• Support software integration activities, trials, and demonstrations
• Analyse logs and data to identify issues and demonstrate compliance
• Execute formal software qualification testing

• Provide regular updates to project leads and stakeholders
• Produce detailed test and analysis reports to support certification
• Support software release and final delivery activities

• Experience in systems proving, software testing, or verification & validation (V&V)
• Understanding of testing complex systems across the development lifecycle
• Strong problem‑solving mindset and ability to work in a fast‑moving environment
• Excellent communication skills with both technical and non‑technical stakeholders
• Ability to manage your own workload and continuously improve ways of working

• Python scripting and/or test automation
• GitLab, Jenkins, CI/CD pipelines
• JIRA, IBM DOORS / ALM / ETM or similar tools
• Log and data analysis
• Agile / Scrum environments
• Software simulation or emulation (desirable)

• ISTQB or similar software testing certification
• Experience working on complex, safety‑critical, or real‑time systems