Senior Trading Systems Engineer - Low-Latency FIX (C#.NET)

Harrington Starr; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Benefits offered by this job

Bonus & equity

Hybrid work

Learning & mentoring

Office presence London/Newcastle

Job summary

Harrington Starr in London/ Newcastle seeks a Senior C#.NET Electronic Trading Engineer to join a leading institutional digital asset firm. Build low-latency IRD trading systems with FIX connectivity, optimise for live trading, and collaborate with traders, quants and product teams.

You will develop core server-side C#.NET components and work across order management, market connectivity and price distribution in a hybrid work setup with strong salary and equity potential.

Qualifications

• 10+ years of Microsoft tech development in trading systems.
• Excellent core .NET and C# skills with concurrency knowledge.
• Proven experience in low latency pricing and trading systems.
• Strong profiling and optimisation in live trading conditions.
• Experience in low latency messaging (FIX, Aeron, 29West) and encodings.

Responsibilities

• Build next generation low-latency IRD trading systems from ground up.
• Develop core server-side C#.NET components across OMS, market connectivity, latency messaging, price distribution.
• Work deep in the stack: profiling, optimisation, tuning under live trading.
• Create applications for FIX Connectivity development.
• Collaborate with front office traders, quants and product teams.
• Own issues end-to-end from design to production support.
• Contribute to the technical strategy of a fast-growing trading platform.

Skills

Concurrency & Multithreading

Low Latency Awareness

Performance Profiling

Tools

C#.NET

.NET Core

FIX Connectivity

SBE

Aeron

29West

Low Latency Systems

Event-Driven Architecture

Job description

Harrington Starr in London/ Newcastle seeks a Senior C#.NET Electronic Trading Engineer to join a leading institutional digital asset firm. Build low-latency IRD trading systems with FIX connectivity, optimise for live trading, and collaborate with traders, quants and product teams.

You will develop core server-side C#.NET components and work across order management, market connectivity and price distribution in a hybrid work setup with strong salary and equity potential.