Development experience in Objective-C and manual memory management (this does not mean that you need to dig into obj-c code, but some projects use it), Swift and Xcode;
Experience with UIKit, Core Animation, GCD, Core Data and WatchKit;
Experience in developing client-server applications, experience with JSON, XML;
Ability to optimize code and improve its performance;
Working with version control systems Git, etc.
Welcome skills:
Development in C++;
Flexibility, fast learning, high motivation and product approach to work;
Initiative and making to take responsibility;
Knowledge of English at the level of Intermediate and above.