Senior C# Developer .Net - FinTech

Senior C# Developer / Engineer (C# .Net Desktop Application) Reigate / WFH to £90k

Do you have expertise with C# desktop development, working on complex scalable systems?

You could be progressing your career, in a senior, hands‑on leadership role working on complex and technically challenging systems with continual learning opportunities at a global Fintech.

As a Senior C# Developer you’ll join an Agile team responsible for the flagship desktop insurance platform that handles 4 billion requests per month. You’ll play a key role in architecting, designing and developing new features and enhancements whilst ensuring high levels of security, reliability, maintainability, usability and performance.

You will collaborate with the Product Owner and with other development teams to input into design and technical choices and provide technical ownership in an Agile environment that encourages close collaboration and continual improvement.

There is a flexible work‑from‑home hybrid model – you’ll join colleagues in the Reigate office twice a week for team meet‑ups and stakeholder meetings, with the other three days worked from home.

• You have expertise with C# .Net Core backend software development, having worked on large, scalable systems with complexity.
• You have strong technical leadership experience (taking ownership of features, not managing people).
• You are collaborative and pragmatic yet able to push back and influence senior engineers.
• You are an advocate of creating clean, reusable and maintainable code and have a good knowledge of modern Microsoft software engineering best practices.
• You have good knowledge of event‑driven architecture.
• You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patters, Algorithms.
• You have a good understanding of CI/CD and Infrastructure as Code (IaC).
• You have an appreciation of Azure, SaaS, PaaS, microservices.
• You are likely to be degree‑educated in a relevant STEM discipline (e.g. Computer Science) with a good grasp of mathematics.

As a Senior C# Developer / Engineer you will receive a competitive salary plus a range of perks and benefits:

• Up to £90k salary plus bonus (c 20%).
• Hybrid working (3 days a week work from home).
• Enhanced parental leave.
• 25 days holiday (plus buy days and your birthday off).
• Pension (up to 10% contribution).
• Health Care and Life Assurance.
• Training and career development.
• Social events and a range of other perks.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We’re an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.