C# Developer (Junior-Mid) - Global Fixed Income Trading Desk

Our client is seeking an experienced C# Strategy Developer to join its Front Office Trading Technology team in London. This role offers a unique opportunity to work closely with the Head of Trading Desk and senior traders to design and develop strategic trading software solutions that directly influence trading performance. It is a high-visibility, high-impact position suited to skilled developers who thrive in fast-paced, collaborative environments where technology and strategy intersect.

Key Responsibilities

• Design, build, and enhance C# applications that support and drive real-time trading strategies.
• Collaborate directly with traders, quantitative analysts, and the Head of Trading Desk to develop tools and analytics that enable informed decision-making.
• Build and maintain high-performance, low-latency systems supporting execution, pricing, and strategy development.
• Manage the full software development lifecycle—from concept and design through to deployment and production support.
• Identify and optimize performance bottlenecks, ensuring systems scale effectively with evolving business needs.
• Contribute to the architecture and evolution of our client’s front office trading systems, prioritizing reliability, efficiency, and innovation.

Qualifications and Experience

• Bachelor’s degree (or higher) in Computer Science, Engineering, Mathematics, or a related technical discipline.
• A minimum of 2 years’ professional experience developing server-side applications in C#/.NET.
• Strong understanding of object-oriented design, concurrency, and real-time systems.
• Proven experience in delivering high-performance or low-latency applications.
• Excellent communication and collaboration skills, with the ability to work directly with traders, quantitative researchers, and technology leaders.
• Previous experience in a front office environment or with trading system development is highly desirable.
• Familiarity with Python or WPF/MVVM frameworks is advantageous.
• A genuine passion for building robust, efficient, and scalable software solutions that deliver measurable impact.