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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior C# Engineer - **Company:** WTW - **Location:** Reigate, UK - **Experience:** Expert - **Salary:** £73,042.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Automation of Tests, Unit Testing, Microsoft Azure, Software Bug Management, C Sharp (Programming Language), Cloud Computing, Code Coverage, Software Quality, Continuous Integration, Software Debugging, Software Design Patterns, Design of User Interfaces, Graphical User Interface Testing, Windows Presentation Foundation, Object-Oriented Software Development, Scrum Methodology, Software Architecture, Software Tools, Mstest, Software Engineering, Software Systems, Windows Forms, Application Enhancement Tool, GitHub Copilot, Technical Debt, Git, System-level Testing, Solid Principles, Information Technology, Extreme Programming, Software Version Control - **Published:** September 6, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5872114853 ## About the Role * Proficient in software development using C# .NET * Experience with the full software development lifecycle in a commercial/production environment: requirements capture and analysis, estimation, detailed software design, implementation, unit and system-level testing, installation and deployment, maintenance * Experience with software engineering best practices: object-oriented design and implementation, design patterns, SOLID principles, Agile and Extreme Programming methodologies * Experience with software development tools: IDE's, version control, test automation, continuous integration, defect and backlog management systems * Ability to coordinate day-to-day development and bug fixing activities * Ability to design high-performance, scalable and extensible software architectures which are also easy to test, debug and maintain * GUI design/implementation, knowledge of standards and frameworks such as WPF or WinForms * Appreciation of current and emerging technologies along with their potential benefits and limitations * Azure DevOps and Git * Experience of unit and GUI test automation frameworks such as MS Test * Azure and Cloud Technologies * Passion for maths, statistics and complex algorithms * General knowledge of the Insurance Industry * Degree-educated with Computer Science, Engineering, Mathematics or relevant discipline Other highly desirable, but not essential skills are passion for leveraging AI-powered tools such as GitHub Copilot to accelerate development, improve code quality, and enhance productivity. ## Description As a Senior Software Engineer, you will work as part of a highly skilled and close-knit development team following Scrum methodologies to develop market-leading insurance pricing solutions. This is a varied and challenging opportunity where you will play a key role creating new product features and enhancing existing code, whilst ensuring the product continues to meet high levels of reliability, maintainability, usability and performance., * Working with the Product Owner to define, refine and deliver the product backlog * Designing and documenting software solutions meeting functional and non-functional requirements * Implementing and refactoring product code (C#), following best practices for maintainability, testability and performance * Implementing unit tests, developing test frameworks and associated automated test cases * Reviewing and debugging code to identify defects, performance bottlenecks or technical debt * Working closely with test engineers to guarantee suitable test coverage, identifying and executing manual tests if necessary * Participating in sprint planning meetings, daily stand-ups and sprint retrospectives, striving to continuously improve the team velocity, its processes and engineering practices * Mentoring junior members of the team and taking a lead role for some of the above activities ## Related Videos - [Are you still programming unit tests or already generating?](https://www.wearedevelopers.com/videos/722-are-you-still-programming-unit-tests-or-already-generating) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Practical tips for keeping your C# code base clean](https://www.wearedevelopers.com/videos/100149-practical-tips-for-keeping-your-c-code-base-clean) - [How Unit Testing Saved My Career](https://www.wearedevelopers.com/videos/1642-how-unit-testing-saved-my-career) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) - [Testing .NET applications a Tool box for every developer](https://www.wearedevelopers.com/videos/704-testing-net-applications-a-tool-box-for-every-developer) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Software Engineer Salary in The UK](https://www.wearedevelopers.com/magazine/231-software-engineer-salary-in-the-uk)