A Swift developer builds, tests and refines apps for mobile devices that use Apple’s iOS operating system. They make sure there is agreement between the goals and norms of company and client. Aside from iOS smartphones/tablets, they sometimes program for other devices as well. Hence, they have great insight in iOS, and know how to work with several Apple devices, like the iPhone, iPad, Apple Watch and Apple TV. They are also able to modify their applications to the needs of the company or client. They are familiar with Xcode, which is mostly used for programming iOS and macOS applications.