A -Wire developer designs, implements, and maintains systems that use the -Wire protocol, a communication system between devices that only requires a single data line and ground. This includes devices like temperature sensors, identification tags, and more. Their responsibilities involve understanding the protocol thoroughly, writing code to interact with -Wire devices, debugging issues, and improving system performance. They also participate in the entire development life-cycle, from planning to deployment, ensuring the system's reliability and efficiency. Often, they work in multidisciplinary teams, collaborating with other professionals to integrate -Wire devices into larger systems.