Make modifications in ASP.Net web application

My new project idea involves making modifications to an existing ASP.Net web application. I have a clear idea of the modifications that need to be made and can provide details in a document. Additionally, I have existing code to serve as a reference while making these modifications. It is important to note that I am looking for someone who is able to complete the modifications within 3 days. And more functionalities are to be added in the code.