User Profile Synchronization - App Part

Hi Everyone,

I haven't worked a lot on SharePoint 2013 App Model and wonder if the scenario I have is possible to be implemented in SharePoint App Model.

I need to have the App stored somewhere in Azure where the sequence of functionality is as follows - 

1. Create a SharePoint list in Azure site collection

2. Mirror the list from Azure site collection to on premise SharePoint

3. On premise list queries User Profile Synchronization service and dumps the data into it

4. Copy the list content from on premise site collection to Azure

I know there is a possibility of doing the entire process in maybe 2 or 3 steps, please elaborate if this is possible.

Thanks.