Salary: £38,000 - 78,000 per year Requirements: Degree Qualified (BSc or equivalent) in Software Engineering, Computer Science or equivalent experience Experience with C++, C#, Java, and web development (HTML, CSS, JS, etc.) Exposure to other embedded development (Linux, bash/shell scripting, terminal command-line scripts, Qt/QML) Strong experience architecting cradle-to-grave software solutions including Technology Readiness Level (TRL) process Proven track record with creating and maintaining servers, primarily those with versioning control, Bugzilla, project management capabilities and automated testing capabilities Strong experience of software development lifecycle processes, ensuring quality of process and firm traceability from requirements to implementation Experience of creating and managing cloud-based big data solutions desirable Proven track record of working collaboratively with a diverse range of internal and external stakeholders Must be in a position to obtain UK security clearance to SC level, with further security clearance to DV level desirable Adherence to STS Defence core values required Responsibilities: Develop and maintain software throughout the Software Development Lifecycle from requirements elicitation to in-service delivery Provide technical leadership on software projects for key stakeholders and on software development activities undertaken by the company Manage code and quality reviews to ensure relevant quality standards are met across the software team Coordinate day-to-day software development in a small team Design and implement software changes through the change control process as part of spiral development Lead the planning, delivery, and assurance of software work packages Ensure software engineering processes and best practices are followed Provide oversight, direction, and guidance to allocated project team members Offer software engineering technical input into bid preparations and contracts Support project software requirements including customer and stakeholder meetings as necessary Explore opportunities for further business development Technologies: Big Data Bash C# Cloud CSS Embedded Support Java Linux Qt Security Web C++ More: We are STS Defence, a dedicated team focused on developing leading-edge software solutions. As a Senior Software Engineer, you will play a vital role in shaping our projects while benefiting from a collaborative environment that encourages continuous improvement and innovation. Our location offers the chance to work with state-of-the-art technologies, and we value your commitment to our core principles while we strive to enhance our software development capabilities. last updated 8 week of 2026