changes required in .net based c# custom software

I am looking for a skilled developer to implement new features in my .net based c# custom software. The changes required are of high priority and there is no specific deadline for completion. The ideal candidate should have experience in .net, c#, and software development. The specific changes needed include:

- Implementing new features requested by the client
- Ensuring proper integration with existing functionalities
- Conducting thorough testing to ensure bug-free implementation
- Providing user-friendly interface improvements

If you have the necessary skills and experience, please submit your proposal along with relevant examples of past projects.