An AWS IoT developer leverages Amazon Web Services' Internet of Things platform to create, implement, and maintain IoT solutions. They connect devices to the AWS cloud, manage data collection, and implement real-time analytics to drive insights. They work on device software, control services, and data management. They also ensure the security of IoT systems by implementing AWS IoT security features. Furthermore, they troubleshoot any issues that arise in the IoT network. Their role is crucial in enabling businesses to make data-driven decisions, automate processes, and develop new services or products based on IoT technology.