Application Support Specialist C# / SQL

Salary: £? - ? per year

Requirements:

• Experience in application support for development teams in production environments
• Strong knowledge of T/SQL, C# .NET, and Oracle
• Experience troubleshooting applications and implementing fixes such as code changes and SQL scripting
• Experience checking and supporting Windows Servers, databases, and related application environments
• Ability to liaise effectively with support teams, development teams, and business stakeholders
• Experience with incident and problem management processes
• Awareness of performance, scalability, and security considerations across design and implementation phases
• Ability to participate in application release support, disaster recovery configuration, and production support activities
• Willingness to provide out-of-office-hours support as part of the production support team

Responsibilities:

• Provide application support for development teams in production environments
• Communicate with Data Centre and Help Desk staff to support production issues
• Analyse failures, identify root causes, and resolve issues by liaising with development teams and internal and external support teams
• Troubleshoot application failures and implement solutions, including code fixes and SQL scripting
• Check Windows Servers, databases, and other relevant environments where applications run
• Liaise with technical support, network, infrastructure, DBA, and other support teams when users experience application issues
• Communicate with primary support Helpdesk staff in London and New York to provide advice and suggestions
• Work with team members and the wider development team to establish best practices for application support
• Analyse and define appropriate application configuration to meet business requirements
• Contribute to technical and design workshops and suggest ideas to achieve stable application operations
• Help define application support standards to ensure applications can run safely in production
• Participate in planning and estimating work volumes for application support
• Work with the application release team on production rollouts to minimise failures after release
• Consider performance, scalability, and security during design and implementation phases
• Follow incident and problem management processes, keeping ticket updates accurate and stakeholders informed
• Participate in defining and configuring application environments in disaster recovery sites
• Support continuous improvement of application support methodology across the team and wider support departments

Technologies:

• C#
• Support
• Network
• Oracle
• SQL
• Security
• Windows
• ASP.NET

More:

We are hiring an Application Support Specialist for a Tier 1 bank on a 6-month contract with a very likely extension. The role is hybrid, with 3 days per week in our Canary Wharf office. Our tech stack includes T/SQL, C# .NET, and Oracle. This is a production support role within a collaborative team environment, with involvement across London and New York and out-of-office-hours support required as part of the production support team.

last updated 34 week of 2026