An Android OS developer designs and develops applications for devices powered by the Android operating system. They conduct software analysis, programming, testing, and debugging, ensuring smooth performance of the application. They work with data sources and APIs, and implement application functionalities according to the design. They also troubleshoot and resolve issues related to application development, including fixing bugs. Their work involves continuous evaluation, discovering new technologies, and exploring their applicability to enhance the application's capabilities. They work closely with other IT specialists, such as UI designers, to create a user-friendly and efficient app.