Develop a push notification system on existing applications (IOS/Android)

Do some work on two existing applications on IOS/Android the work is divided into two tasks The first task: Push notification system. (most important) Develop a push system that will be based on this system [login to view URL] I've acquired the license​, all the features found in the plugin must be checked and tested, and you must add some other features that are not available in this plugin. Here are the features to be added. - Send scheduled push notification messages. - Set up a cron system that sends push scheduled. - Option to delete or change the push scheduled (for example: if I make a mistake on a text). - Ability to push and redirect the user to a specific screen in the application or an external link. - Send push text message and directing users into an article in the app. - Ability to send basic push that redirects to the home screen with a popup window. - Customize push display on the notifications bar (when push is sent, the user should see the full title and the image) I'll show screen shots as an example. Second task: Auditing code of android application and fix any bugs. - Load the contents of json when the splash screen and admob are loading.​ (to prevent the user waits too long during his access to the app)​ ​ - Make app faster, for connections who have a low internet ​connexion​ - Create the Sqlite DataBase for offline Mode. - Fix any bugs After completion​, a ​t​echnical monitoring should be performed three months to correct any problems encountered on the app and push. You must allow me to follow the evolution of work step by step and make the testes with me to ensure that the work meets my expectations. It is essential to respect the deadlines