Senior C#/.NET Engineer – Low Latency FX Trading

• Strong command of modern C# and .NET (8/9/10)
• Solid experience with asynchronous programming (async/await, TPL)
• Deep understanding of multithreading and concurrent programming
• Ability to write high-performance, memory-efficient code
• Strong knowledge of LINQ, generics, dependency injection, and clean architecture
• Experience building and integrating REST APIs, WebSockets, and external systems
  
  

• Experience building responsive, component-based applications
• Strong fundamentals in C# (Blazor) or TypeScript (React/Angular)
• Understanding of asynchronous and reactive UI patterns
• Familiarity with modern state management (Fluxor, Redux, or similar)
• Experience implementing real-time UI updates (SignalR, WebSockets, streaming APIs)
• Ability to integrate frontend applications with backend services
  
  

• Strong understanding of low-latency, high-reliability communication systems
• Experience with FIX Protocol (4.2, 4.4, 5.0 SP2):
  • Session management (logon, heartbeats, sequencing)
  • Order lifecycle (New Order, Execution Reports, Cancel/Replace)
  • Market data streaming and event-driven flows
• Experience with messaging systems such as Kafka, RabbitMQ, or similar
• Solid understanding of TCP/UDP sockets and real-time data flows
  
  

• Understanding of FX instruments: Spot, Forwards, Swaps, NDFs
• Familiarity with pricing models: bid/ask, spreads, market depth
• Knowledge of execution types: IOC, FOK, Limit, Market
• Understanding of liquidity providers, ECNs, and aggregation
• Basic risk concepts: PnL, mark-to-market, exposure, positions
• Awareness of settlement conventions (T+2, holidays, exceptions)
  
  

• Experience designing event-driven systems
• Knowledge of low-latency and high-throughput architectures
• Strong understanding of concurrency and thread-safe design
• Experience with microservices architectures (where applicable)
• Familiarity with logging, monitoring, and observability tools (Serilog, ELK, Splunk, AppInsights)

Project Details:

Location: Amsterdam

Duration: 12 month (extendable)

Industry: Banking

Contract: With Levy Professionals

Work: Hybrid