A Data Backup developer is responsible for creating and maintaining backup systems to ensure that data can be recovered in the event of a system failure. They work with database administrators and other IT staff to determine what data needs to be backed up and how often, and they design backup systems that meet those needs. Data Backup developers also test backup systems regularly to ensure that they are working properly, and they troubleshoot any issues that arise. In the event of a system failure, they work with IT staff to restore data from backups.