A Cisco Unity Express (CUE) developer is responsible for developing and managing voice mail and automated attendant systems for small to medium-sized networks using Cisco's Unity Express solution. They configure, maintain, and troubleshoot CUE systems, ensuring high-quality voice messaging. They also integrate CUE with Cisco Call Manager and Call Manager Express. Their role includes scripting interactive voice response systems and setting up voicemail boxes, call handlers, and user profiles. They understand networking protocols, VoIP fundamentals, and possess strong scripting skills. Furthermore, they work with other team members to deliver comprehensive voice solutions.