C# Developer - trade capture/commodities - sought by leading firm based in London - Contract - Hybrid *outside iR35* What You'll Be Doing Designing and developing enterprise-grade solutions in an Agile team. Building and maintaining middleware services using C#, REST APIs, FIX messaging, XML, and Microservices. Leading architecture discussions, code reviews, and release management. Collaborating with users and cross-functional teams to define and execute testing strategies. Mentoring junior developers and contributing to internal best practices.What You Bring A strong academic background in Computer Science, Engineering, or a related field. Proven experience in commodities trading, especially with derivatives and platforms like ICE, CME, NASDAQ, Trayport, or TT. Deep knowledge of C# .NET, RESTful services, and microservice architecture. Hands-on experience with FIX messaging, XML, AMQ, and ideally nHibernate, OData, and TDD. Familiarity with Agile tools like JIRA, Confluence, and Crucible. Excellent communication skills and a pragmatic approach to problem-solving.Please apply within for further details - Matt Holmes, Harvey Nash