C# Developer

Cloudspirit; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

Cloudspirit is looking for a talented C# Developer to join a high-performing team in London. As part of a hybrid role, you will work on innovative financial systems within a global markets environment, contributing to a distributed P&L and risk analytics platform.

Your responsibilities include developing .NET/C# services and implementing Agile best practices. The position offers collaboration with global teams and the chance to participate in the full software development lifecycle.

Qualifications

• Strong expertise in C# / .NET development.
• Experience with Redis Cluster.
• Solid understanding of TDD and automated testing.

Responsibilities

• Developing and maintaining scalable .NET/C# services.
• Building and supporting real-time data processing systems.
• Driving Agile best practices, including test-driven development.

Skills

C# / .NET development

Agile best practices

Redis Cluster

Continuous Integration / Continuous Deployment (CI/CD)

Automated testing

Distributed systems

Performance and memory profiling

Job description

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
• 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
• 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.