iOS developers are responsible for developing and maintaining applications for mobile devices powered by Apple's iOS operating system. They use the Objective-C programming language and the Cocoa Touch framework to build these apps. Some reasons you might want to consider hiring an iOS developer include: - They can help you develop custom applications that take advantage of the unique features of iOS devices. - They can help you port your existing applications to run on iOS devices. - They can help you optimize your applications for performance and battery life on iOS devices.