ION SME/Application Support Engineer

ION SME London | Hybrid | Contract Up to £1000 per day - Inside IR35 We''re looking for an experienced End-to-End ION Subject Matter Expert to lead the design, implementation, integration and support of a global ION trading platform within a Front Office Investment Banking environment. This is a hands-on role requiring deep expertise across the full ION ecosystem, working closely with Front Office users, development teams, infrastructure, vendors and business stakeholders to deliver strategic platform enhancements and maintain a highly available electronic trading environment. Key Responsibilities Act as the technical SME for the end-to-end ION platform across multiple business areas. Lead the architecture, design and implementation of new ION environments and platform enhancements. Own technical delivery for ION-related projects, upgrades, migrations and strategic initiatives. Design and implement integrations between ION and internal/external trading systems. Support the complete trade life cycle from order capture through execution, confirmations and downstream processing. Provide technical leadership during production releases, upgrades and disaster recovery activities. Troubleshoot complex production issues across Front Office trading applications. Work closely with traders, developers, infrastructure teams and third-party vendors to resolve business-critical issues. Define best practices, standards and operational procedures for the ION platform. Produce High-Level ..... full job details .....