Application Support Engineer

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

Role Overview

Talan is seeking an experienced Application Support Engineer to join a high-performing global team supporting the eTrading environment for a leading investment banking client.

Operating within a Production & 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 a complex, 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

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

Required Skills & Experience

• Strong experience in Application Support within electronic trading or capital markets environments

• Solid expertise across Linux and Windows server environments

• Experienced within Wintel Engineering

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

Desirable Skills

• Experience with ION trading platforms or similar vendor systems
• Knowledge of multicast messaging and low-latency trading architectures
• Monitoring tools such as Geneos or Zabbix
• Experience with Splunk or similar log analytics platforms
• OS performance tuning and optimisation

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