Application Support Engineer – Trading Systems (Fintech) £500–£575/day Inside IR35 6-Month Contract - Hybrid (London – 3 days) - With the option to convert to perm. You'll be working in a front-office trading environment in Central London. The business is scaling its support and engineering capability across critical trading and post-trade systems. They are investing heavily in automation, resilience, and next-gen tooling (including AI/LLMs), creating a role that sits beyond traditional support — closer to engineering, optimisation, and platform ownership. This hire is driven by growth, system complexity, and the need to modernise workflows across both execution and post-trade operations. Strong likelihood of long-term extension or permanent conversion.The Role This is a high-impact support & engineering role within a live trading and post-trade ecosystem: Own stability and performance of production trading and post-trade systems Drive automation across support processes (PowerShell / Python) Troubleshoot complex issues across Windows, SQL, and integrated applications Work closely with traders, ops, and vendors to resolve and prevent issues Improve post-trade workflows, reconciliation, and data processing pipelines Influence system improvements and future platform direction Engage with vendor platforms (e.g. TT, ATEO or similar post-trade/reconciliation solutions) What We’re Looking For Strong PowerShell and/or Python scripting capability Experience in trading / financial services environments Solid Windows and SQL background Exposure to post-trade or reconciliation platforms - Preferably Trading Technologies ATEO system or similar such as Duco, SmartStream, etc.) Proven track record of automating and improving support functions Comfortable in high-pressure, front-office-aligned environments Interest or exposure to AI / LLM tooling (bonus) Why This Role Direct impact across trading and post-trade operations Blend of support, automation, and engineering ownership Exposure to AI-driven initiatives and modernisation work Clear path to long-term role in a growing platform environment To apply – click the link or email Barry.Ansell@HarringtonStarr.com for a faster response
Locations
City of LondonLondon
