Senior Software Engineer (C / C++) Salary £60,000–£75,000 bonus & excellent benefits Stevenage | Hybrid working (3–5 days on-site) This role requires eligibility for SC clearance – British citizenship is essential Are you a Software Engineer looking to work on complex, real-world systems where reliability and performance truly matter? We’re looking for a Senior Software Engineer to join a highly collaborative engineering team delivering advanced test and validation software for cutting-edge systems. This is an opportunity to work across the full product lifecycle, developing solutions that directly support the testing and assurance of highly complex technology. What you’ll be doing: Designing and developing software for test equipment used on complex systems and sub-components Writing high-quality software in C / C++ (with some scripting where needed) Working closely with electronics, systems and test teams to deliver integrated solutions Supporting automation, continuous integration and DevOps practices Contributing to the development of robust, reliable and maintainable software Debugging and validating systems using real hardware and measurement equipment What we’re looking for: Strong experience developing software in C or C++ Background in developing test solutions or working with hardware-integrated software Experience working in Agile development environments Good understanding of software quality practices and standards Familiarity with CI/CD, automation and DevOps principles Experience working with lab equipment such as oscilloscopes or spectrum analysers is highly beneficial Why apply? Work on complex, mission-critical systems across the full development lifecycle Be part of a collaborative, engineering-led environment Opportunity to work with advanced technologies and modern development practices Clear progression opportunities within a growing team What’s on offer: Salary between £60,000 - £75,000 depending on experience Company bonus (up to £2,500) Pension contributions up to 14% Paid overtime opportunities Up to 15 additional flexi-leave days Enhanced parental leave Excellent on-site facilities including subsidised meals and free parking If you’re looking for a role where your work has real impact and you can develop your career in a technically challenging environment, apply now.