Build and modernize high-performance C#/.NET calculation engines supporting liquidity risk, treasury, XVA, financial resources, and trading systems. Develop event-driven microservices, messaging services, Windows Services, REST APIs, real-time feeds, and SQL data layers. Implement complex financial calculations, optimize distributed systems, maintain CI/CD pipelines, and apply AI developer tools. This is a hands-on senior individual contributor role in a London investment-banking environment.

Provide live IT support for production-critical front-office trading systems during market hours. Monitor trading activity, investigate incidents, manage market data configurations, support electronic execution workflows, and collaborate with trading, development, and infrastructure teams. Participate in change management, testing, and release deployments. The role requires fluent French and English, basic-to-intermediate Linux/UNIX and SQL knowledge, strong communication, pragmatic problem-solving, and curiosity about financial products and trading processes.

The Mid Level Business Developer at MARGO is responsible for business development and recruitment within their business unit, managing major accounts and consultant team onboarding.