Fidessa Engineer - Equities/OMS Domain

A leading global trading organisation is transforming its equities execution platform to support greater scale, flexibility, and execution choice. As part of this journey, we are looking for a senior OMS/EMS specialist with deep Fidessa expertise to join a high-impact Trading Technology team.

OMS / EMS (Fidessa) Specialist - Equities Trading

Location: London OnsiteRate: £700-800 per day (PAYE)Duration: 6 months initially

You will lead the integration between an in-house Order Management System and Fidessa EMS, while also contributing to the strategic move toward a modern, multi-EMS / headless EMS architecture. This role sits close to the front office and plays a critical part in shaping how equities are executed across global markets.

• Design and deliver the integration between the internal OMS and Fidessa EMS, covering order entry, executions, and allocations

• Define and implement FIX connectivity (sessions, order routing, execution reports, drop copies)

• Partner with Fidessa and internal engineering teams to align APIs, feeds, and messaging models

• Own and optimise the end-to-end trade lifecycle from order creation through booking and reporting

• Work closely with Trading, Product, and Risk/Compliance to ensure robust controls and data integrity

• Troubleshoot complex OMS-EMS issues including latency, sequencing, and reconciliation

• Contribute to architecture and POCs for a scalable, fault-tolerant multi-EMS / headless EMS model

• Produce clear interface documentation and operational runbooks

• 10+ years in equities trading technology within large buy-side or sell-side environments

• Strong hands-on experience integrating Fidessa with custom or vendor OMS platforms

• Deep understanding of high-touch, low-touch, and algo trading workflows

• Solid knowledge of global market structure, order types, and execution strategies

• End-to-end understanding of the trade lifecycle, including allocations, booking, and regulatory reporting

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