A Clusters developer is responsible for designing, building, and maintaining clusters, which are groups of servers and nodes that work together to increase processing speed, data integrity, and system reliability. They implement cluster management solutions, optimize cluster performance, and ensure system security. Their work involves managing data storage, handling network communication, and troubleshooting any issues. They deal with technologies such as Hadoop, Kubernetes, and Docker. It's crucial for them to understand distributed systems and be proficient in coding languages like Python or Java. They also work closely with data scientists and engineers to facilitate high-performance computing.