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Harrington Starr Logo Harrington Starr · IT - Software Development

C# .Net Developer

United Kingdom, London · Job Posted January 10, 2026
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Job Description

You’ll be joining a global financial services firm to support and develop business-critical .NET applications used across multiple international offices. Your mission — build, maintain, and enhance C# and .NET business applications, ensuring they are robust, performant, and aligned with business needs. This is a hands-on, technically focused role for someone who understands C#.NET, SQL Server, Oracle, and enterprise application development — and can turn business requirements into reliable, high-quality software solutions. You’ll work closely with development teams, DBAs, and business users to design, implement, and support applications across multiple environments including Production, Disaster Recovery, and QA.

Job Responsibility

  • Develop and maintain C#.NET applications supporting business processes
  • Analyse business requirements and design appropriate solutions
  • Program and maintain applications using Visual C#.NET, with both SQL Server and Oracle databases
  • Perform unit testing, QA, and production implementations
  • Support existing applications, troubleshoot system issues, and provide IT support for development environments
  • Liaise with SQL and Oracle DBAs across multiple offices
  • Write T-SQL and PL/SQL scripts for data analysis
  • Manage system distribution for Citrix and application servers (Web & Windows applications)
  • Follow development team Change Management Control procedures for all production updates
  • Maintain applications by updating MS .NET Framework and Visual .NET platform versions
  • Provide occasional out-of-hours support as needed (weekdays/weekends)

Requirements

  • 3+ Years C#.NET, Visual Studio, SQL Server, and Oracle
  • Proven experience in enterprise application development and support
  • Solid knowledge of production, QA, and disaster recovery environments
  • Excellent problem-solving, troubleshooting, and communication skills
  • Experience working with cross-functional teams and following Change Management procedures
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