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Fiverr Pro
English
$
USD
I will rescue your legacy c sharp net winforms or wpf application
David R.
About this gig
I modernize, fix, and extend legacy .NET applications without losing the business logic that makes them valuable.
I'm a U.S.-based Principal Software Engineer, with excellent communication skills, focused on legacy modernization and production software.
My background includes decades of production software work across web, desktop, backend, automation, workflow systems, and high-scale business platforms. I work with C#, .NET, ASP.NET Core, WinForms, WPF, Blazor, Angular, APIs, SQL Server, Entity Framework, and distributed backend systems.
This gig is a good fit for legacy .NET bug fixes, targeted feature development, refactoring hard-to-maintain code, WinForms or WPF improvements, backend/API work, desktop-to-web transition efforts, and modernization planning.
I focus on practical, maintainable changes with clear communication and well-defined scope. Please message me before ordering if your project is large, unclear, or involves multiple unrelated changes.
Send me: a clear description, source files or repo access, repro steps for bugs, expected result, and screenshots if UI-related.
Get to know David R.
David R.
Legacy Dot NET Rescue and Modernization for Business Systems
- FromUnited States
- Member sinceJun 2020
Languages
English
I am not a bot. That *is* me in the photo with an AI background. I have been coding for over 20 years for Fortune 100 companies. You've probably bumped up against something I've worked on.
On Fiverr I focus on modernization and desktop-to-web conversion. I build, refactor, and extend production software across .NET, web, desktop, backend, automation, and workflow platforms. I specialize in modernizing aging systems, preserving business logic, fixing hard problems, and delivering practical, maintainable solutions. Strong in C#, ASP.NET Core, Angular, Blazor, WinForms, WPF, APIs and Queues.
Other Software Development Services I Offer
FAQ
What kinds of apps do you work on?
C#/.NET applications including WinForms, WPF, ASP.NET Core, backend services, internal tools, and legacy business software.
Do you work on older codebases?
Yes. Legacy modernization and refactoring are core strengths.
Can you convert desktop applications to web applications?
Yes, where appropriate. Message me first so I can scope the conversion honestly.
Do you work with APIs, databases, and backend logic?
Yes. I handle UI, backend, integration, and business-logic-heavy systems.
Do you support VB.NET?
Yes, especially in legacy maintenance, modernization, and migration scenarios.
