Senior Back-End Software Developer (C#, .NET, APIs, Azure, MACH, SQL) £60-72,000 based on experience Are you passionate about building robust, scalable back-end systems that power meaningful change? Join a leading non-profit organisation as a Senior Back-End Software Developer, where your technical expertise will directly contribute to impactful, mission-driven solutions. This is a UK-based remote opportunity offering the chance to work with cutting-edge technologies in a supportive, purpose-led environment. Key Responsibilities: Design, develop, and maintain scalable and secure back-end services and APIs. Lead architectural decisions and contribute to the evolution of a modern, cloud-native platform. Collaborate with cross-functional teams to ensure seamless integration between services and systems. Champion best practices in code quality, testing, and DevOps automation. Leverage cloud technologies (Azure preferred) and microservices principles to build resilient systems. Essential Skills & Experience: Strong experience in C#/.NET development, with a deep understanding of object-oriented programming and design patterns. Proficiency in SQL (T-SQL preferred) and experience with relational database design and optimisation. Solid understanding of cloud platforms (Azure or AWS), including services like Azure Functions, App Services, and Azure SQL. Experience with CI/CD pipelines, Git, and infrastructure-as-code practice...