Senior Application Support Engineer

Company: Harrington Starr
Apply for the Senior Application Support Engineer
Location: Hyde Park Corner
Job Description:

London

Key responsibilities:

  • Provide 3rd line production and UAT support for critical trading applications
  • Investigate complex issues across application, OS, database and network layers
  • Perform detailed root cause analysis using logs, code and monitoring tools
  • Support production deployments, configuration management, DR and BCP activities
  • Develop scripts, SQL and application changes to improve reliability and automation
  • Work closely with technology, product and client-facing teams
  • Drive automation and continuous improvement across the support function
  • Strong experience in production/application support within financial services
  • Front-office or electronic trading application support experience
  • Strong Linux and Windows administration knowledge
  • Python, Bash, PowerShell, Perl or similar scripting experience
  • Strong SQL/database experience, ideally SQL Server and MongoDB
  • Strong understanding of networks, APIs and application integration
  • FIX API experience
  • Experience with Git and production deployments
  • A genuine engineering mindset with strong problem-solving skills

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Posted: September 22nd, 2026