A Miracast developer works on creating, testing, and maintaining software that supports Miracast technology, a wireless display standard used for streaming video and audio from one device to another. They write code that enables devices to discover, connect, and communicate with each other seamlessly. Their work involves understanding networking protocols, device interoperability, and media streaming principles. They also troubleshoot and resolve any issues with the software, ensuring optimal performance and user experience. In addition, they often collaborate with other developers and stakeholders to integrate Miracast technology into various products and applications.