With good Object-Oriented practices and knowledge of useful frameworks (IoC - Objection) produced code always have highest quality, which makes it easy to maintain over time.
Ability to organize the application data flexibly and efficiently. For app to have flexibility in development, and be very quick in usage.
Knowing Useful Libraries like: XLForm, SVProgressHUD, QuickDialog, etc...
Sufficient enough knowledge about platform to develop application from the beginning to the end.
Experience in writing an app that had Facebook integration using the newest SDK.
Experience in writing apps using Maps and Location Services.
Good theoretical and practical knowledge of Test Driven Development, and application testing. Fluency in using libraries like: Expecta, OCMockito, OCMock, Specta.
Most of apps that I worked on had client-server communication, with either XML or JSON as data format. I am familiar with useful libraries (this makes the implementations simpler) that can be used in such cases like: Mantle, AFNetworking
Working with AppCode for the last 1,5 years. Knowing all the necessary shortcuts for refactoring, code generation etc.
Experience with CocoaPods. It is a dependency manager for Objective-C projects.
Experience integrating 'Stripe Payment System' into app.