C# Developer: Modernize Legacy Apps with REST & SQL

Company: Upbeat Ideas UK Ltd

Location: London

Posted: April 11th, 2026

ASP.NET MVC experience would be a significant positive
Entity Framework experience would be a significant positive
.NET Core beneficial but not required.
Good understanding of the principles of REST-based web applications.
Experience dealing with existing complex legacy code bases – demonstrated ability to unpick existing code, work out what it does, and make changes or new implementations while retaining existing functionality.
Good SQL knowledge, particularly with MS SQL Server.
Experience with Git beneficial, good experience with branching/source control a must.
Good ability to interact with business users and understand their needs.
Experience working in Agile Scrum team would be beneficial.

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