An Android developer specializes in designing and programming applications for devices powered by the Android operating system. They use the Android Software Development Kit (SDK) and other tools like Java, Kotlin, and SQL to create user-friendly applications. Their work involves interpreting application specifications, coding and testing the application, fixing bugs, and ensuring its performance and responsiveness. They also collaborate with cross-functional teams to define and design new features, while also continuously discovering, evaluating, and implementing new technologies to maximize development efficiency. They are responsible for the apps' maintenance and updates, and often work closely with UX/UI designers.