Salary: £? - ? per year Requirements: We are looking for a Software Test Engineer with experience in end-to-end software testing and proving across the full development lifecycle. We need someone with strong knowledge of software test automation and the ability to write and run test plans, test sets, designs, and specifications. We require experience in software logs and data analysis, including identifying issues and supporting defect investigation. We are looking for knowledge of CI/CD software pipelines and tools such as GitLab, JIRA, scripting, and IBM PLM/ALM/EWM/DOORS. We need familiarity with Agile Scrum methodologies. We are seeking someone who can understand compliance and regulatory requirements, or has relevant experience in this area. Desirable experience includes AI test automation tooling. Desirable experience includes software simulation or emulator environments. Desirable experience includes Linux network configuration and analysis tools. A background in software testing, verification, qualification, or certification activities would be highly beneficial. The role is based in Stevenage and requires onsite presence for most of the week, with hybrid working possible. We are hiring for a 12-month initial contract, inside IR35. The role is for 37 hours per week, with overtime paid at time and a quarter for hours worked beyond 37. Responsibilities: We will rely on you to own the end-to-end software testing and proving lifecycle for our simulation software releases and defects. You will understand customer needs and requirements from a proving perspective. You will assess design and architecture to define software test bed requirements. You will develop comprehensive software test plans and create, run, and maintain test sets, designs, and specifications. You will carry out regular progressive software testing assurance during development cycles. You will lead the testing and verification of software defects. You will liaise with our support team to provide logs and data analysis when issues are identified. You will demonstrate compliance to requirements through formal testing activities. You will execute formal software qualification testing. You will provide regular updates to project leads and stakeholders on software functionality and progress. You will write detailed software test and analysis reports for certification purposes. You will support the software delivery and release process, including final certification activities. You will work closely with our simulation developers, Group Leads, and Project Leads within the Environment Simulators team. You will contribute to a rigorous, best-practice testing approach to ensure our simulations are fit for purpose and mission-ready. Technologies: AI CI/CD GitLab IBM Support JIRA Linux Network More: We are a world-class defence organisation offering an exciting opportunity to join our Simulation Software department as a Software Test Engineer subcontractor. You will be based in our Stevenage office, working closely with our Environment Simulators team and simulation developers on mission-critical simulation products for weapon system and sub-system teams. Our department uses the full development lifecycle and agile methodologies to build rigorously tested, fit-for-purpose solutions. This is an initial 12-month contract with the potential to continue long term, offered inside IR35. The role is based on a 37-hour week, with overtime available at time and a quarter, and hybrid working is possible with likely onsite attendance four days per week. A compressed four-day working week Monday to Thursday may also be possible. last updated 23 week of 2026