Our financial services client is seeking a C# Trading Systems Developer (10+ years) to develop and enhance low-latency electronic FX trading systems using C# .NET and FIX protocol Join an Electronic FX trading team supporting business-critical components within a global trading platform environment.

This role focuses on developing and maintaining low-latency C# .NET trading systems, supporting market data distribution and electronic trade flows, and contributing to backend service migration initiatives.

The position involves collaboration across a portfolio of trading applications while supporting performance, scalability, and operational reliability.

Contract duration: 6 months contract with possible extension Location: Toronto, Hybrid - King St West, Toronto ON - Hybrid 2 days/week Must Haves 7+ years of qualified C# .NET development experience Strong technical expertise is required for this role,



including experience with optimizing software performance and reducing latency Familiar with the FIX protocol Strong analytical and problem-solving skills Strong verbal and written communication skills; eager to ask questions; able to clearly explain ideas Strong collaborative and team skills Strong multi-threaded programming skills Strong understanding of financial markets and electronic trading systems Nice to Have BA/BS degree in Computer Science Familiarity with Broadway FX Familiarity with Java Previous banking experience Responsibilities Design and develop software solutions for trading systems Develop algorithms and data structures aligned with platform and architectural requirements Create test cases to support software stability and reliability Collaborate with teams to research and implement trading system changes Communicate with operations teams regarding new features and strategy behaviors Support production issues through root-cause analysis and diagnosis Process business requirements and execute implementation proposals independently or with the team

📌 C# Trading Systems Developer to develop and enhance low-latency electronic FX trading systems using C#.NET and FIX protocol (Toronto)
🏢 S.i. Systems
📍 Toronto