Full job description Application Support Engineer (eTrading) - Contract - London - Inside IR35

A leading global investment bank is seeking an experienced Application Support Engineer (eTrading) to join its Front Office-aligned electronic trading support team.

This role sits within a global production support function responsible for supporting mission-critical Rates and Credit electronic trading systems. You’ll work closely with traders, developers, infrastructure teams and external market venues to ensure the stability, performance and availability of a highly complex trading environment.

The team supports a large-scale global infrastructure estate across Europe, North America and Asia, covering pricing platforms, algorithmic trading systems, market connectivity and straight-through processing solutions.

Responsibilities
*Day-to-day support of production trading environments
*Monitoring platform health, capacity and performance
*Incident management, troubleshooting and root cause analysis
*Managing production changes, releases and upgrades
*Supporting connectivity to exchanges, ECNs, brokers and market data providers
*Working closely with development and infrastructure teams to improve resilience, availability and performance
*Coordinating production activities with internal stakeholders and external vendors
*Taking ownership of key applications and becoming the go-to technical expert for supported systems
*Maintaining and improving operational documentation and support procedures
Required Experience *Strong Linux and Windows administration skills
*Experience supporting front-office or electronic trading applications
*Strong troubleshooting skills across CPU, memory, networking and system performance issues
*Scripting experience using one or more of: *Python
*Shell
*PowerShell
*SQL

*Experience with Jenkins, Ansible or other CI/CD and automation tools
*Good understanding of servers, networking and firewall infrastructure
*Experience supporting Java, C++ or .NET applications
*Excellent incident management and problem-solving skills
Desirable Skills *Experience supporting low-latency trading platforms
*Knowledge of electronic trading workflows
*Monitoring tools such as Geneos, Splunk or Zabbix
*Multicast messaging experience
*Experience with fixed income, rates or credit trading environments
*Exposure to vendor trading platforms and exchange connectivity
About You *Self-motivated with a strong sense of ownership
*Able to work effectively under pressure in a production environment
*Strong analytical and troubleshooting capabilities
*Excellent communication and stakeholder management skills
*Team-oriented with a proactive approach to problem solving
*Comfortable operating in a global support model and collaborating across regions
Why Apply? *Front-office facing role supporting business-critical trading platforms
*Exposure to complex, low-latency electronic trading environments
*Opportunity to work with global teams across multiple regions
*High visibility position with close interaction across trading and technology functions
*Long-term contract potential within a leading financial markets environment