An IMS DB/DC developer works on IBM's Information Management System (IMS), a joint hierarchical database and information management system with extensive transaction processing capabilities. Their duties include designing, developing, and maintaining databases, ensuring data integrity, and managing data storage. They also develop applications to interact with the database, write code, troubleshoot and fix bugs. They work on transaction processing, ensuring smooth and efficient data retrieval and updates. They may also be responsible for maintaining system performance and security, and often work closely with other IT professionals, such as system administrators and data analysts.