A leading global trading firm is looking for a C# .NET Developer to join its trading systems team. You’ll work across front office, risk, and operations to build and support business-critical systems that handle real-time trade execution, messaging, and integration. This role focuses on developing high-performance services using the .NET framework, integrating with FIX protocols, and leveraging message queuing technologies such as RabbitMQ or Kafka. You’ll play a key role in improving trade flow automation and operational efficiency across the front-to-back lifecycle. Key Responsibilities: Design and develop .NET-based services that integrate trading systems using FIX Build and maintain messaging infrastructure using RabbitMQ, Kafka, or similar Develop robust APIs and services for trade capture, enrichment, and routing Work closely with traders, middle office, and risk to enhance STP and reconciliation workflows Support and optimise CI/CD pipelines (e.g., TFS Build, Azure DevOps) Troubleshoot and resolve production issues in a low-latency trading environment Required Experience: Strong development experience in C# and .NET Core/.NET Framework Hands-on experience integrating FIX protocols (e.g., QuickFIX/n, OnixS) Proficiency with message brokers (RabbitMQ, Kafka, MSMQ, etc.) Knowledge of STP, order lifecycle, and post-trade processing Familiarity with CI/CD tools like TFS Build, TeamCity, or Azure DevOps Solid understanding of trading and risk systems in capital markets Desirable: Background in equities or FX trading environments Exposure to microservices architecture and distributed systems Experience with SQL Server and database-driven workflows Agile delivery experience and comfort working in fast-paced, regulated environments This is a great opportunity to work at the heart of a high-performing trading business, using modern .NET technologies to build and support systems critical to front-to-back trade execution and processing. To apply, contact Cititec or submit your CV today.