https://jobs.co.uk/job/principal-software-engineer-jonathan-lee-recruitment-ltd--12bd6023-6c7e-43b3-bfb0-2a339b04c94e RSS feed for Principal Software Engineer at Jonathan Lee Recruitment Ltd. en-gb Thu, 03 Sep 2026 15:09:08 GMT https://jobs.co.uk/job/principal-software-engineer-jonathan-lee-recruitment-ltd--12bd6023-6c7e-43b3-bfb0-2a339b04c94e https://jobs.co.uk/job/principal-software-engineer-jonathan-lee-recruitment-ltd--12bd6023-6c7e-43b3-bfb0-2a339b04c94e Thu, 03 Sep 2026 11:53:08 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