Salary: £50,000 - 60,000 per year Requirements: 5 years of commercial full stack development experience Degree in Computer Science or a similar discipline Strong capability with C# / .NET (latest frameworks) and React with TypeScript Hands-on experience with both relational and non-relational databases Knowledge of API-centric architectures and distributed systems Practical experience with version control and CI pipelines (e.g., Git-based platforms) Strong analytical and debugging skills, with a collaborative mindset Responsibilities: Design and implement server-side components and services using C# and modern .NET frameworks Build and enhance web applications using React and TypeScript Develop and maintain robust APIs and distributed services Work closely with cross-functional teams to deliver high-quality technical solutions Participate in secure-by-design development practices and code reviews Support CI/CD workflows and assist with performance optimisation Provide guidance to junior team members where required Technologies: API C# CI/CD Git Support JavaScript React Security TypeScript Web ASP.NET Cloud Docker Marketing Fullstack More: We are seeking a Full Stack Developer to join our established defence-technology organization in South Wales. Our client operates within the defence industry, necessitating a level of security clearance. This role is ideal for individuals with strong experience in modern Microsoft and JavaScript technologies, who are passionate about building secure, resilient, and scalable software for critical environments. In this position, you will contribute to the development of advanced digital solutions, working across the full lifecycle—from design and architecture to deployment and continuous improvement. This role offers long-term career progression within a collaborative technical environment, and the opportunity to work on systems of national importance. We offer an excellent opportunity to obtain security clearance, a competitive salary, and an outstanding benefits package, including an annual bonus, pension scheme, healthcare, 25 days of annual leave plus Bank Holidays, and many additional perks. last updated 12 week of 2026