iPhone app for ticket barcode scanning

Right, in looking for a developer to create a mobile app for scanning and verifying barcoded tickets. These tickets will be printed or scanned directly from a phone. My website has been specially designed for this and below is an extract from my web developer of what the app developer will need to do: "So, the way we will have to do this is to use web service methods. I will build a page lets say "[login to view URL]". The app developer will have to send requests to this page. The page will receive the request and send a response. So pretty much I will have to take care of all the server side processing and the app developer will have to use my web methods to parse information. So if the user was to sign in, then the app will send the credentials to the server to be validated and send a response. Once the user is signed in I can use a SessionID or something to get all their information from the database/XML files on the server and send it to the app. " As you can see, there is not too much to ask for from the app developer as most of the work will be done on the web server side. Please make sure you understand the requirements before bidding for this project. Thank you On top of the description above, the app will be able to access user information including purchased tickets etc