Senior Software Engineer Windows/Desktop Applications - Cambridge United Kingdom

Required:

• 3+ in Windows desktop application development using Windows App SDK WinUI (or similar) C# XAML — and ideally additional experience with native Windows code (C++ Win32/WinRT/COM).
• Deep understanding of Windows application architecture including interop between managed code (.NET) and native code.
• Proven track record of designing building and shipping production-quality desktop applications with an emphasis on reliability performance scalability and maintainability.
• Strong experience with accessibility APIs on Windows (e.g.

  Microsoft UI Automation or similar) and a dedication to building accessible and inclusive software.

• Excellent software engineering fundamentals: OOP design patterns data structures algorithms memory management multi-threading or asynchronous programming (where relevant).
• Experience leading technical design mentoring other engineers conducting code reviews and making architecture-level decisions.
• Strong communication skills; ability to articulate tradeoffs collaborate with cross-functional teams and drive consensus.
• A user-centric mindset: focus on building polished intuitive and accessible experiences for end users.

Preferred / Bonus:

• Experience with writing automated tests for UI — unit tests integration tests UI automation tests; familiarity with relevant testing frameworks.
• Experience with performance optimization for desktop apps (memory usage startup time rendering performance high-DPI support responsiveness under load).
• Experience with localization/globalization right-to-left UI support internationalization accessibility for multiple regions.
• Familiarity with telemetry analytics crash reporting logging and error monitoring in desktop applications.
• Previous experience in shaping CI/CD workflows release pipelines and deployment strategies for desktop applications.
• Demonstrated ability to take ownership of feature areas or modules and drive them long-term including maintenance refactoring and technical debt management.

What we offer

• A high-impact role: you will define architecture shape the future of our Windows product and directly influence what millions of users see and experience.
• A collaborative flat-structure engineering culture — you are not just a coder but a builder and a decision-maker.
• Opportunities to lead — mentor others steer technical direction and grow into broader technical leadership (e.g.

  Tech Lead Architect).

• Flexibility autonomy and responsibility: you define how to solve problems own features end-to-end and contribute to long-term product vision.
• A purpose-driven mission: building software that’s reliable accessible and user-centered — making a real difference for people.                  

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