https://jobs.co.uk/job/principal-software-engineer-jonathan-lee-recruitment-ltd--e81d989e-d06f-482b-bd2c-451be03e822f RSS feed for Principal Software Engineer at Jonathan Lee Recruitment Ltd. en-gb Tue, 18 Aug 2026 14:21:04 GMT https://jobs.co.uk/job/principal-software-engineer-jonathan-lee-recruitment-ltd--e81d989e-d06f-482b-bd2c-451be03e822f https://jobs.co.uk/job/principal-software-engineer-jonathan-lee-recruitment-ltd--e81d989e-d06f-482b-bd2c-451be03e822f Tue, 18 Aug 2026 11:52:09 GMT Location: Berkshire | Salary: 65000.00-65000.00 Annual | Type: Permanent | Ready to take a big step in software engineering? As a Principal Software Engineer, you''ll lead from the front in embedded and application software, help shape the technical direction, and mentor a talented team working on cutting-edge cyber and defence technology. This Principal Software Engineer role offers real autonomy, meaningful impact, and the chance to deliver high-quality software into complex, mission-critical programmes. What You Will Do: ? Architect, design, implement, document and test embedded and/or application software to a strong project software development process.? Apply object-oriented design and design patterns to enable re-use and smooth integration with test frameworks.? Review system design artefacts and derive software requirements and architecture that meet high-level system needs.? Maintain high-quality software design using modelling tools such as RSA and Enterprise Architect (EA), supporting accurate code generation where required.? Drive best-practice development, including TDD/BDD, Continuous Integration, DevSecOps and static and run-time analysis, with a focus on secure software development.? Lead technical reviews, sign off significant technical d... Permanent