Objective-C, or increasingly, the Swift 3.0 programming language
Apple’s Xcode IDE
Frameworks and APIs like Foundation, UIKit, and CocoaTouch
UI and UX design experience
Apple Human Interface Guidelines
2D and 3D graphics frameworks like SpriteKit and SceneKit - Preferred
OpenGL or Metal, iOS graphics APIs
Familiarity with iOS 10 and newer OS versions
A Git code repository technology