A Confd developer specializes in using Confd, a network management software developed by Tail-f Systems, now owned by Cisco. Their primary role involves creating and managing network configurations using YANG data models. They work on implementing network protocols such as NETCONF and RESTCONF and use Confd's transactional database for configuration data. They handle functionalities like configuration data validation, transaction management, and operational data handling. Additionally, they collaborate with network engineers to understand the requirements and ensure efficient network operations. Their knowledge in XML, JSON, and XPath is essential for managing data stores and manipulating data.