Build A cross Platform Application for andriod, iphone, windows, etc..

Hello everyone, I am looking for programmers to build a cross platform application for my event. We are hosting a competition and need an application to help keep track of a large amount of real time data, and allow interactions between judges and competitors (VENDORS). A cross platform application With multi-platform interaction, That can store profile information gathered from sources like facebook, google+, etc , Display profile information, Display Real Time Data, Generate Individual QR CODES, with ability to Scan QR CODE, an ability to display QR CODES, allow Profile Interactions, allow profile data exchange, ability Input Data, record 10 sec video recording, ability to input and display POLL DATA, eCommerce Purchasing, ability to add advertisements to the app, DESKTOP BROWSER INTERFACE with access to real time data. must have a background in graphics design must be available to work with skype or other video conferencing software. will be able to provide more detailed information with inquiry. there is a lot of detail about how i want the app to interact so please ask questions and listen carefully. we want the beta to be completed by January 2017 to release and begin testing the app must be finished BY JULY 2017 Our Budget is $1500 - $2500