I'd like to discuss the details of this project with you. As a professional .NET programmer, with a degree in software engineering, and 5+ years experience using the .NET framework, I'm sure I can write your backend code. I'm accustomed to using VB.NET at my workplace, but can use C# if you prefer. Do you need business logic created, or do you need the UI coded? For the stated fee, I would plan to deliver a well-written, working, and maintainable product, with a small amount of unit testing written to support any complex business logic. Thanks for your time. Have a great day.