Our client, a Defence & Security supplier is looking for a Software Test Engineer to join them on a contract basis at their site in Tewkesbury. Due to the nature of the role, applicants must hole the sole British nationality and either hold current SC clearance or be eligible to obtain this. Please note you will need to wait for full SC Clearance to be granted before starting. 6-month initial contract. Fully onsite due to the nature of the role. £70 p/h Ltd, outside IR35.Key Responsibilities: Develop, execute, and debug tests using Python and Pytest Verify embedded software primarily developed in C++ on Linux-based systems Collaborate with software developers to understand design requirements and define effective test strategies Support creation of test artefacts such as test plans, test cases, and test reports Investigate and troubleshoot issues found during testing Occasionally contribute to software and UI development tasks (e.g., bug fixing in C++, TypeScript, or React) Align testing activities with project milestones provided in real-time by the Project ManagerDesirable Skills & Experience: Experience with Python and Pytest for test automation Familiarity with embedded C++ development on Linux Understanding of software testing methodologies and debugging practices Exposure to RF equipment is a plus, but not required Knowledge of UI development, particularly TypeScript and React, is beneficial Strong communication skills and the ability to work effectively within a multidisciplinary team