An Interop developer focuses on creating interoperability between different systems, software, and services, enabling them to communicate and function together. They are responsible for designing, coding, testing, and debugging applications that connect diverse systems. Their tasks involve working with APIs, understanding various protocols, and using languages like Java or C#. They often work with complex issues that arise from system interaction, finding solutions that allow seamless integration. They collaborate with other developers and stakeholders to optimize system compatibility, improve data exchange, and ensure overall system functionality. They also perform regular system updates and maintenance.