An iOS Developer is a software engineer who specializes in creating applications for Apple's iOS operating system, which powers devices like the iPhone and iPad. They use programming languages such as Swift and Objective-C to build user-friendly apps that can be downloaded from the App Store. These developers work closely with designers and other team members to ensure that the apps are functional, visually appealing, and provide a great user experience. They also test and debug their applications to fix any issues before releasing them to the public, ensuring high-quality software for users.