* Windows & layout of their content* Drawing & graphics support* Enabling new input devices and other hardware* Responding to user events* User controls like buttons, sliders, and tables* Document management infrastructureAs a developer on the AppKit team, you'll constantly improve existing components and bring new user interface concepts to life. You'll be responsible for crafting and evolving the Objective-C and Swift APIs that application developers use to build their apps, and you will provide guidance and support for internal and external developers that adopt those APIs. Our team works together closely in an open, collaborative environment – ready to share or discuss ideas, problems, and solutions. We frequently work cross-functionally with a variety of teams including HI (Human Interface) designers, hardware engineers, technical writers, and more. We encourage curiosity and initiative, and depend on the ability to learn and grow when approaching new features and technology. The technical problems we solve are often challenging, and we play a critical role in making the Mac what it is.