Application Support Engineer – Elite Systematic Trading Firm - Prop Trading - Market Leading Compensation - Hybrid - London

CompanyMondrian Alpha

LocationLondon Area, United Kingdom

Posted At1/6/2026

UK Visa Sponsorship Analytics

Analytics are greyed out due to low classification confidence (47.0%).

Occupation Type

IT user support technicians

Occupation Code Skill LevelMedium Skilled

Sponsorship Salary Threshold

£41,700 (£21.38 per hour)

Standard minimum applies

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Description

My client, an elite systematic trading firm, is looking for an Application Support Engineer to join a high-impact, London-based team at the cutting edge of global markets.

This is a career-defining opportunity to join an engineering-driven firm where technology is core to every decision. You will provide mission-critical support for low-latency trading systems, automate infrastructure and application processes, and collaborate directly with trading, development, and infrastructure teams.

You will operate in a high-performance environment that values precision, initiative, and continuous innovation.

Key Responsibilities

Ensure maximum uptime of latency-sensitive trading platforms, proactively identifying and resolving production issues.
Automate and enhance support functions using Python, SQL, and monitoring tools like Splunk and Grafana.
Collaborate with traders, developers, and network engineers to troubleshoot live issues and optimise trading operations.
Build, maintain, and document proactive alerting systems and health checks for internal and external connectivity (e.g., FIX, REST APIs).

Drive operational excellence through robust incident management, process improvement, and knowledge-sharing across regions.

Play a key role in onboarding new trading desks, products, and exchanges—delivering low-latency infrastructure and reliable integration.

Ideal Candidate Profile

3+ years’ experience supporting high-performance trading systems in a Python and Linux-heavy environment.
Proven expertise in FIX protocol, trading workflows, and exchange connectivity.
Skilled in scripting for automation (Python, Bash) and familiar with tools like Ansible and Geneos.
Experience with relational databases (Postgres, Sybase, Oracle) and writing performant SQL queries.
Knowledge of production-grade monitoring tools (e.g., Grafana, Splunk), alert tuning, and system health validation.
Understanding of low-latency infrastructure, colocation environments, and performance tuning (CPU affinity, NUMA).
Strong communicator with a sense of urgency and ownership; capable of leading investigations

To apply, please send your CV to jimmy.xu@mondrian-alpha.com or respond directly to this advert.