Ruby on Rails Developer Needed--immediate project

We are a marketing firm looking for a ROR developer who can build an online hub to work with a mobile app. You will be developing a site with the following criteria: 1.) people can take videos from the site 2.) people can upload photo with a text caption 3.) people can upload text comments 4.) site will post video/photo/text to multiple sites site needs to interact with apis on the following: company site and sites such as [login to view URL] to upload text comments / photos and in some cases video 5.)site needs to post updates on: facebook, twitter, 6.) online hub will store data from a mobile app 7.) site will generate coupon codes - unique ones per person 8.) site will allow people to start an account with name, email, password 9.) site database works with a mobile app that was built in HTML5. we would like the work to be completed in 4 weeks. please send me urls to SITES you have developed This is a fixed price project. We do not pay hourly.