A Galera Cluster developer designs, implements, and maintains high-availability, multi-master database clusters using Galera technology. They work on ensuring data consistency across the nodes, resolving any conflicts that arise during replication. They also monitor performance, troubleshoot issues, and optimize database operations for efficiency. They work closely with other software engineers to integrate the Galera Cluster into larger systems, ensuring seamless data flow and integrity. They also provide technical support, develop backup strategies, and implement disaster recovery plans. Their role is vital for businesses that require real-time data availability and zero downtime.