Senior Application Support Engineer (Linux, Scripting & SQL)

Harrington Starr; Greater London; On-site; GBP 50,000 - 70,000; Full time

Job summary

Harrington Starr is seeking a technically strong Application Support Engineer in Greater London to work alongside trading and quant teams on business-critical systems.

Candidates should have advanced Linux skills, scripting experience, and a strong understanding of SQL. This role involves deep troubleshooting across Linux-based applications and requires experience in supporting real-time trading environments.

Qualifications

• Advanced knowledge of Linux file systems, permissions, processes, and networking basics.
• Experience in scripting with Bash and/or Python.
• Strong skills in SQL for data analysis and query optimization.

Responsibilities

• Deep-dive troubleshooting for Linux-based applications.
• Identify root cause of performance and data issues.
• Automate operational processes through scripting.

Skills

Advanced Linux knowledge

Scripting experience (Bash and/or Python)

Strong SQL

Experience supporting trading systems

Monitoring & alerting tools (ITRS/Geneos)

Job description

A Global Financial Service Broker / Exchange are looking for a technically strong Application Support Engineer to work alongside trading and quant teams on business-critical systems.

Role focus

• Deep-dive troubleshooting across Linux-based applications
• Identify root cause of performance and data issues
• Automate operational processes through scripting
• Support highly available, real-time trading environments

Core skills

• Advanced Linux knowledge (file systems, permissions, processes, networking basics)
• Scripting experience (Bash and/or Python)
• Strong SQL (data analysis + query optimisation)
• Experience supporting trading / financial systems preferred
• Monitoring & alerting tools (ITRS/Geneos) beneficial

We are specifically seeking engineers with strong technical depth, not purely functional support backgrounds.