Senior Application Support Engineer - Elite SystematicTrading Firm - Prop Trading - Up to £500k......

Job Description Senior Application Support Engineer – Elite Systematic Trading Firm – Prop Trading – Up to £450k TC – WFH My client, an elite and fast-growing 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 – 5+ years’ experience supporting high-performance trading systems in a Python and Linux-heavy environment. – Strong knowledge of the trade lifecycle in one or more asset classes (e.g., FX, Commodities, Equities). – 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 and mentoring junior staff. To apply, please send your CV to moses.lynn@mondrian-alpha.com or respond directly to this advert.