Salary: £55,000 - 95,000 per year Requirements: We require strong commercial experience with Python. We require experience working with AWS cloud technologies. We require hands-on experience with Kubernetes and containerised environments. We require experience building scalable backend systems and APIs. We require a solid understanding of Agile software development practices. We require strong problem-solving and communication skills. We would prefer experience with Golang. We would prefer exposure to DevOps or platform engineering environments. We would prefer knowledge of infrastructure automation and CI/CD tooling. We would prefer experience working within secure or regulated environments. We require active SC Clearance and eligibility for DV Clearance. Responsibilities: We design, develop, and maintain scalable software solutions. We collaborate within Agile engineering teams to deliver high-quality products. We build and support cloud-native applications and infrastructure. We contribute to system architecture and technical decision-making. We develop and maintain CI/CD pipelines and deployment processes. We work closely with cross-functional engineering and delivery teams. We support continuous improvement and engineering best practices. Technologies: AWS Backend CI/CD Cloud DevOps Golang Support Kubernetes Python Security More: We are a leading technology organisation operating within the defence and national security sector, and we are looking for a Senior Software Engineer to join our growing engineering team near Winchester. We offer the opportunity to work on secure, mission-critical systems using modern cloud-native technologies in a collaborative and highly technical environment. Our team delivers innovative software solutions across complex programmes that support national security and defence operations. We offer a competitive salary up to £65,000, a strong pension and benefits package, flexible working arrangements, ongoing training and career development, and the chance to work on impactful, cutting-edge projects within a highly secure and meaningful setting. last updated 21 week of 2026