Simple QR app for iOS and Android OS

Budget is $350 MAXIMUM. This is a very simple app for iOS and Android. Using ZBar for both iOS and Android OS, I am looking for someone that is capable of delivering a simple rapid prototype that will go on both app stores. The project consists of 3 screens: - Login (check via JSON response) - ZBar ([login to view URL]) - UIWebView with JSON string attached to the URL I am only interested in users that are capable of delivering quickly, but can also communicate well and via Skype. *You MUST know how to convert a PHP custom base64 function on both OS as this will be used. I am only interested in users that are capable of delivering quickly, but can also communicate well and via Skype. You MUST: - be available on Skype to chat about progress - be able to deliver quickly and on time - have a great reputation and at least 50+ feedback on iOS/Android