Salary: £70,000 - 75,000 per year Requirements: We require at least 5 years of proven software development experience in a fast-paced environment. We require strong front-end experience with Angular, React, HTML5, CSS3, AJAX, Bootstrap, and UI best practices. We require strong back-end expertise with ASP.NET MVC/.NET Core, Java EE/Spring Boot, or similar frameworks. We require proficiency in database design and management using MySQL, PostgreSQL, SQL Server, MongoDB, and Entity Framework, including T-SQL and PL/SQL scripting. We require hands-on experience developing SOAP and REST web services and integrating third-party APIs. We require familiarity with cloud platforms such as AWS and Azure for deploying scalable applications. We require knowledge of Linux environments and shell scripting; Python scripting skills are advantageous. We require competence with version control systems including Git, GitHub, SVN, and TFS, with an understanding of CI/CD pipelines preferred. We require a strong understanding of OOP principles and experience with UML modelling; WCF services knowledge is a plus. We require experience across the application development lifecycle from initial design through testing to deployment. Responsibilities: We lead the design, development, testing, and deployment of complex software applications across multiple platforms. We collaborate with cross-functional teams to define technical specifications and architecture using UML and SDLC methodologies. We develop and maintain front-end components using Angular, React, HTML, CSS, Bootstrap, and UI best practices. We build robust back-end services with ASP.NET, Java, C#, PHP, Ruby on Rails, Node.js, Python, and JavaScript. We design and optimise database schemas for MySQL, PostgreSQL, Microsoft SQL Server, MongoDB, and Oracle, and implement efficient T-SQL and PL/SQL queries. We develop APIs and web services, including SOAP and REST, ensuring secure and scalable integrations. We use version control systems such as Git, GitHub, SVN, and TFS for code management, and perform code reviews and debugging to uphold code quality standards. We implement unit testing strategies to validate functionality and use tools like SSRS and SSIS for reporting solutions. We participate in system architecture planning, including microservices architecture and cloud deployment on AWS and Azure. We maintain documentation using UML diagrams and XSLT, and contribute to continuous improvement initiatives within the SDLC framework. Technologies: AJAX ASP.NET AWS Angular Azure Bootstrap C# CI/CD Cloud CSS Git GitHub HTML5 Java Java EE JavaScript Linux MongoDB MVC MySQL OOP Oracle PHP PostgreSQL Python REST Rails React Ruby SOAP SQL Spring Spring Boot SSIS SVN UML Web microservices UX UI Design NodeJS Bash More: We are seeking an experienced Senior Developer to join our dynamic software development team. This role offers the opportunity to work on innovative projects, utilise cutting-edge technologies, and contribute to the design and implementation of scalable software solutions. The successful applicant will help lead development efforts, mentor junior team members, and ensure the delivery of high-quality applications aligned with business objectives. We offer a salary of £70,000.00-£75,000.00 per year, along with a company pension, paid volunteer time, and the option to work from home. The role is hybrid remote in Watford, Hertfordshire, in the East of England Region. last updated 24 week of 2026