Hiring process was separated in two parts: technical interview & interview with your future manager. Technical interview took two hours & contains questions about all sides of iOS developing: - Memory Control - Objective-C & Swift syntax - Architecture & patterns - Core Foundation & UIKit - Multithreading - Core Data - Unit testing - ... Also, I was asked to demonstrate my speaking English skills. Interviewer was very gentle & friendly. He controls the process on 100% & answered all my questions after interview even we were out of time. During interview with manager I was asked to demonstrate my architecture skills. There was a task to create a class base of some abstract App. Using of computer was prohibited, so I was just writing class structures on a pieces of paper.