Senior C# Developer - Financial Technology

Senior C# Developer | FinTech | London (Hybrid) | Permanent

We are proud to be supporting a leading financial technology firm in the UK in their search for an exceptional Senior C# Developer to join their high-performing engineering team.

This is a fantastic opportunity for an experienced developer to take a leading role in designing and building cutting-edge systems that power asset management, trading, and investment operations across global financial markets.

Key Responsibilities:

• Design, develop, and maintain high-performance backend systems using C# and .NET (Core and Framework)
• Architect scalable, secure, and modular applications for the financial domain
• Collaborate closely with cross-functional teams including Quant Developers, DevOps, and Product Managers
• Drive architectural decisions, mentor junior developers, and enforce coding best practices
• Optimize system performance, reliability, and scalability
• Participate in rigorous code reviews and contribute to continuous improvement

Key Requirements:

• 10+ years of professional experience in C# / .NET development
• Strong grasp of OOP, multithreading, and asynchronous programming
• Proven background in building high-performance, low-latency systems (preferably in financial services)
• Deep understanding of software architecture, design patterns, and data structures
• Proficiency with SQL Server or similar RDBMS
• Exposure to cloud platforms like AWS or Azure
• Strong foundation in version control, automated testing, and CI/CD

Nice to Have:

• Experience in trading systems, risk platforms, or investment tools
• Knowledge of market data feeds, FIX protocol, or financial instrument modeling
• Exposure to Docker, Kubernetes, or containerized deployments

What’s on Offer:

• Opportunity to work on complex, large-scale systems used in global finance
• Join a high-caliber engineering team committed to technical excellence
• Competitive salary & benefits package
• Hybrid working model with flexibility (London-based)

How to Apply:

If you're a skilled C# engineer passionate about building robust, scalable systems in finance, we’d love to hear from you.