Application Support Engineer

Location: London (On-site, 5 days per week)

Role Overview

Talan is seeking an experiencedApplication Support Engineer to join a high-performing global team supporting theeTrading environment for a leading investment banking client.

Operating within aProduction & Application Support function, this role sits at the heart of front-office trading technology, ensuring the stability, performance, and continuous improvement of critical electronic trading platforms.

You will work in acomplex, low-latency environment supporting high-volume trading flows, interacting closely with trading desks, development teams, and infrastructure specialists across a global follow-the-sun support model.

Key Responsibilities

• Overseeday-to-day production support activities, including monitoring, incident management, and capacity planning
• Act as a key point of contact forissue resolution, liaising with traders, developers, infrastructure teams, and external vendors
• Take ownership of assigned applications and platforms, developingdeep technical expertise
• Support and enhanceelectronic trading systems, including pricing engines, algorithmic trading components, and STP workflows
• Manageconnectivity to external trading venues (e.g. exchanges, ECNs, market data providers)
• Contribute tosystem design improvements, focusing on resilience, scalability, and performance optimisation
• Coordinaterelease and change management activities, ensuring robust deployment processes
• Participate in ashift-based rota (7am–6pm coverage) andon-call support, including occasional weekend work
• Collaborate with global teams across Europe, North America, and Asia within afollow-the-sun support model
• Continuously improve documentation, monitoring, and operational processes

Required Skills & Experience

• Strong experience inApplication Support within electronic trading or capital markets environments

• Solid expertise acrossLinux and Windows server environments

• Experienced within Wintel Engineering

• Good understanding ofmarket connectivity, networking, and infrastructure (firewalls, multicast, latency considerations)
• Ability to analyse system performance acrossCPU, memory, network, and messaging layers
• Proficiency in scripting and automation (e.g.Python, Shell, PowerShell, SQL)
• Experience withCI/CD and deployment tools (e.g. Jenkins, Ansible, Artifactory)
• Familiarity with application stacks involvingJava, C++, or .NET
• Strong stakeholder engagement skills with the ability to operate in afront-office facing role
• Proven ability to manage incidents and deliver improvements inhigh-pressure environments

Desirable Skills

• Experience withION trading platforms or similar vendor systems
• Knowledge ofmulticast messaging and low-latency trading architectures
• Monitoring tools such asGeneos or Zabbix
• Experience withSplunk or similar log analytics platforms
• OS performance tuning and optimisation

#TalanUK