Senior C# Developer - Pricing Engines

Join a fast-paced trading tech environment where your C# code powers real-time pricing for traders and automated systems. You'll help modernise and optimise a high-performance pricing engine running on bare metal, focused on FX, bonds and rates-where every microsecond matters.

The Role

As Senior C# Developer, you work on the core pricing and risk engine feeding trader GUIs and multiple downstream systems. You partner with traders, quants and analysts to turn complex market behaviour into reliable, ultra-low-latency technology.

What You'll Do

• Build high-performance C# services on .NET Core for real-time pricing and risk
• Refactor and migrate existing C# and Java components into a unified .NET Core platform
• Optimise multithreading, memory, GC and network performance on bare-metal servers
• Implement curve handling and curve location for FX, bonds and rates
• Integrate with trading tools, market data feeds and external pricing/execution platforms
• Ensure safe, efficient price distribution via internal messaging
• Contribute to automated testing, CI/CD and observability in a 24/7 trading setup
• Work in an agile DevOps team with shared support responsibilities

Your Profile

You enjoy being close to the market and discussing both code and pricing logic.

You bring:

• Extensive experience with C#/.NET in complex back-end or trading systems
• Proven low-latency, high-throughput engineering expertise (ideally in pricing or market data)
• Deep knowledge of concurrency, async IO, performance tuning, profiling, TCP/binary protocols
• Strong understanding of financial markets: FX spot/forwards/swaps, bonds, IR swaps, curves, PV/DV01
• Experience working with front-office stakeholders
• Bonus: Java and Linux familiarity
• Clear communication and the ability to simplify complex concepts

Project Details:

Work: Hybrid

Location: Amsterdam

Type: Temp

Duration: 12 months (option to extend)