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Electronic Trading Engineer - JP Morgan - London - Onsite role We are seeking a Electronic Trading Engineer to join JP Morgan's Trading Technology Team on a multi-year integration programme in London on an initial 12 months contract. You should have recent experience of Fidessa and/or other EMS and OMS technologies along with deep expertise of Equities Trading to be considered for this position. Overview As an Electronic Trading Engineer, you will be responsible for integrating JP Morgan's in-house Order Management System (OMS) with Fidessa EMS and later contribute to the strategic evolution toward a multi-EMS / headless EMS architecture supporting greater flexibility and scalability in trade execution. Key Responsibilities Lead design, development, and deployment of the OMS-Fidessa EMS integration, covering order entry, execution feedback, and trade allocation workflows.Define and implement FIX protocol connectivity, including session setup, drop copy feeds, execution reports, and order routing.Work closely with Fidessa technical teams to establish robust API, feed, and service-level integrations aligned with internal OMS message schemas.Analyse, document, and optimize end-to-end trade lifecycle workflows, from order creation to execution, booking, and trade reporting.Partner with Front Office users, Product, and Risk/Compliance to ensure trading controls, position management, and reporting integrity.Provide advanced troubleshooting for OMS-EMS interaction issues, including message sequencing, latency, and reconciliation gaps.Contribute to design and proof-of-concepts for multi-EMS / headless EMS architecture, ensuring modularity, fault tolerance, and venue flexibility.Document interface specifications, integration patterns, and configuration runbooks for operational support teams.