C# Developer

Job Description

C# Developer - London (Hybrid, 3 Days On-Site)

Talan is looking for a talented and driven C# Developer to join a high-performing team in London. This is a hybrid role, with 3 days per week on-site, offering the opportunity to work on cutting-edge financial systems within a global markets environment.

You will play a key role in building and enhancing a distributed, real-time P&L and risk analytics platform used by Fixed Income Rates and FX trading desks globally. This system delivers predictive and live P&L insights, supporting critical trading decisions across international markets.

Working closely with developers, traders, and quantitative teams, you'll contribute across the full development lifecycle from design and implementation to optimisation and deployment.

What You'll Be Doing

Developing and maintaining scalable.NET/C# services within a distributed streaming architecture
Building and supporting real-time data processing systems for P&L and risk analytics
Working on out-of-process services, system integrations, and data materialisation layers
Driving Agile best practices, including test-driven development (TDD) and automation
Collaborating with global teams across EMEA, NY, and APAC
Taking ownership of features and proactively proposing improvements
Troubleshooting issues and helping unblock cross-team dependencies

Essential Skills & Experience

Strong expertise in C# /.NET development
Experience with Redis Cluster
Solid understanding of TDD and automated testing
Experience with CI/CD pipelines
Strong communication and stakeholder engagement skills
Ability to quickly learn and adapt to new technologies
Passion for automation, simplicity, and continuous improvement
Strong grounding in computer science fundamentals and design patterns
Collaborative team player with a proactive mindset

Desirable Skills

Experience with distributed systems, streaming, and messaging (e.g. Rx.NET)
Knowledge of performance and memory profiling
Experience optimising systems for speed and efficiency
Familiarity with modern CI/CD tools and practices
End-to-end experience across the full software development lifecycle

If you're a passionate C# developer looking to work on complex, distributed systems in a fast-paced environment, we'd love to hear from you.