Parse.com Contact List With Core Data Sync

We have a simple iOS app that uses Parse.com. The iOS app has a contacts list. To decrease network traffic, we would like the contacts list on [login to view URL] to sync with core data. The apps works like this: The app fetches a registered user's name and thumbnail if they have been added to their contact's list. There are 2 sets of classes set up on Parse.com. A _User class that has a name, phoneNumber, email, and thumbnail column. A User_Relation class that has a friend and user column. There are 2 screens on the app. A Contacts List screen and a Add Users screen. In the Add Users screen [UITableView], the app goes through the user's address book and displays any friend that is registered based on the friend's phone number in the _User class. The user is then allowed to add the friend to their contacts list by clicking on a plus icon next to the friend's name. In the User_Relation class, the user's email is added to the user column and their friend's phone number is added to the friend column. On the Contacts List screen [UITableView], we fetch the user's contacts using: PFQuery *friendsQuery = [PFQuery queryWithClassName:@"User_Relation"]; [friendsQuery whereKey:@"user" equalTo:[PFUser currentUser].email]; PFQuery *contactsQuery = [PFQuery queryWithClassName:@"_User"]; [contactsQuery whereKey:@"phoneNumber" matchesKey:@"friend" inQuery:friendsQuery]; Hope this somewhat helps you understand the flow of the app. We can provide the sample app code that is fully working with Parse.com. We just need someone knowledgeable with Core Data, [login to view URL], and Grand Central Dispatch to sync everything together. Access to [login to view URL] will also be provided. If you do a fantastic job, we have plenty more projects we can send your way.