OS X + iOS application development !(Apps using iCloud Drive)

I'm looking for a developer who can build the following: an OS X app (on El Capitan 10.11.x) and an iOS app (iOS 9.3.x), which creates a folder on the iCloud Drive with a predefined/customized picture as the icon. Like the folders (pages, numbers, ...) you see on icloud.com. You can't specify a picture for a normal folder but it works for an application folder. So the app will need to create application folders. Design of the app: - the top bar contains a login button for iCloud or display if you are already logged in. - the middle part contains a drag and drop area where you can upload your high resolution picture which will be used for the folder-icon. - then an input for entering the name of the new folder - and a button for saving the folder with the following text "Ordner in iCloud Drive anlegen" (which means "Create iCloud Drive folder"). Workflow for the user: - User logs in to iCloud - he chooses a picture to upload - enters a name - creates the folder in the iCloud Drive by click the create button. Important notice: The app can't just create the folder in the library because it won't synchronize 1:1 on the iCloud Drive and won't be displayed. I would like to have the code well documented and fully handed over after the completion of the app in order for future features to be added. I will be happy to answer any questions.