Application Support Engineer
Summary: The Application Support Engineer role focuses on supporting and engineering trading systems within a fintech environment. This position involves working closely with traders and operations to ensure the stability and performance of production systems while driving automation and improvements in workflows. The role is hybrid, based in Central London, and offers the potential for long-term extension or permanent conversion. Candidates should have strong scripting skills in PowerShell and/or Python, experience in trading or financial services, and a solid background in Windows and SQL. The position emphasizes the importance of automation and system improvements, with exposure to AI-driven initiatives and modernisation efforts.
Application Support Engineer
Description:
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
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