facebook app developer needed(repost)

Hello, We need someone who is a developer who has developed apps etc for Facebook. There is a page (located here: [login to view URL] (list of past winners) and [login to view URL] (enter to win) ) that allows things like prize giveaways, etc. We need the same functionality built in for our business. We want to know if it's possible for us to add this app to our existing Facebook page we've built for our business. Please research this page and send a recap of the things you'll need to do in order to accomplish this. Please make sure you have experience with Facebook before placing a bid. Thanks!