Hire a Web Developer

Briefly, i need support to develop a web site for lending and borrowing Bitcoins. To have a very good image of the business, you can see two similar sites: btcjam (is closing now) and bitbond. I would like to implement just the basic operations, not every features and details you can find on those sites. Finally I will come with a new feature, very simple as implementation, but this will make the difference. So, I need a simple and clear interface to permit to lending and borrow BTC. This will be the only currency. Will remain the need for user registration and an interface to dynamically present the evolution of the amount invested for somebody's request. In back end, some calculations should happen to initially receive the investment and after that to automate the return of the loan, to the investors as the borrower will pay back (periodically). Thank you.