ION SME / Application Support Engineer - Inside IR35 - Up to £850 per day
This position is no longer accepting applications(closed Aug 18, 2026).
ION SME / Front Office Application Support Engineer
London | Hybrid | Contract
Up to £850 per day - Inside IR35
Our client are seeking an experienced ION SME / Front Office Application Support Engineer to join its Front Office Technology team, supporting business-critical Fixed Income trading platforms.
This is a hands-on role supporting live electronic trading environments, working closely with traders, technology teams and key stakeholders to ensure the stability, performance and continuous improvement of Front Office trading systems.
Key Responsibilities
- Provide L3 production support for Front Office Fixed Income trading applications and the ION platform.
- Support the end-to-end trade lifecycle, from trade execution through to downstream processing and settlement.
- Configure, maintain and troubleshoot ION components and trading applications.
- Coordinate production releases, system changes and platform upgrades.
- Maintain Production and Disaster Recovery environments to ensure maximum availability.
- Partner with traders, developers and infrastructure teams to resolve complex technical issues and improve system performance.
Required Experience
- Strong experience supporting the ION Trading Platform within an Investment Banking environment.
- Proven Front Office support experience across Fixed Income, Rates, Credit or Swaps .
- Knowledge of electronic trading venues such as Bloomberg, Tradeweb, MarketAxess, BrokerTec or MTS .
- Strong understanding of the trade lifecycle, including STP, trade processing, positions and risk.
- Experience working within Linux production environments.
- Knowledge of Sybase, SQL, TCL scripting and JIRA would be advantageous.