Senior Developer

Senior Developer Are you ready for your next career challenge?.. Role overview: Provide hands-on technical leadership for the design, development, integration and support of ESCS software capabilities. The Senior Developer establishes engineering patterns, leads complex implementation work and mentors developers while maintaining a strong focus on security, quality and operability. The role you will play: Lead software design and delivery within a capability team. Translate architecture and requirements into maintainable engineering solutions. Raise engineering quality through standards, reviews, automation and mentoring.

Design, build, test and maintain cloud-based applications, services and integrations. Define and apply patterns for APIs, microservices, event-driven integration and data exchange. Lead code reviews, technical design reviews and complex defect resolution. Embed secure coding, automated testing, observability and operational readiness. Contribute to CI/CD pipelines, infrastructure automation and release practices. Create clear technical design and support documentation. Estimate work, identify technical risk and collaborate with architecture, analysis, data, test and infrastructure colleagues. Mentor developers and support consistent engineering practices across teams. Required skills and capabilities: Strong capability in relevant languages and frameworks such as C#/.NET, Java and/or Python RESTful API and integration development Microservices and event-driven architecture Cloud-native engineering on Azure and/or AWS Secure coding and software assurance Automated unit, integration and component testing CI/CD, Git workflows and DevSecOps practices Observability, logging, monitoring and diagnostics Infrastructure as Code awareness, including Terraform or equivalent Technical design documentation and mentoring Required experience: Delivery of production software in complex enterprise environments. Hands-on experience of cloud services, APIs, automated build and deployment pipelines. Experience leading technical implementation, code quality and engineering decisions. Experience integrating with third-party or SaaS platforms.

High-volume transactional or supply chain systems. SaaS customisation, extension and integration. Containers and orchestration platforms. AI-assisted development used within approved engineering and security controls. Success in the role: Software is secure, testable, observable and maintainable. Design decisions and interfaces are clearly documented. Engineering risks are surfaced early and resolved collaboratively. Developers receive practical technical guidance and constructive review. Clearance Requirements: SC required to start SC required for the role ​​ Leidos UK! Join our team and discover a culture of collaboration, innovation, diversity, trust, caring management, communication transparency, work-life balance, and overall job satisfaction... What we do for you: At Leidos we are PASSIONATE about customer success, UNITED as a team and INSPIRED to make a difference. We offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance. We provide an employment package that attracts, develops and retains only the best in talent. Our reward scheme includes: •    Contributory Pension Scheme •    Private Medical Insurance •    33 days Annual Leave (including public and privilege holidays) •    Access to Flexible benefits (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme) •    Flexible Working Scheme Commitment to Diversity: We welcome applications from every part of the community and are committed to a truly diverse and inclusive culture.  We foster a sense of belonging, welcoming all perspectives and contributions, and providing equal access to opportunities and resources