C# Trading Systems Developer to develop and enhance low-latency electronic FX trading systems using C# .NET and FIX protocol - JP1562
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

Must Haves
7+ years of professional 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
Solid 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
Solid multi-threaded programming skills
Strong understanding of financial markets and electronic trading systems

Nice to Have
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

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 professional C# .NET development experience
Solid 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

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