A Graph DBs developer designs, implements, and maintains graph databases, a type of NoSQL database that uses graph theory to store, map, and query relationships. They utilize graph structures for semantic queries with nodes, edges, and properties to represent and store data. Their work involves data modeling, performance tuning, and developing APIs for data interaction. They use graph-oriented programming and query languages like Cypher or Gremlin. They ensure data consistency, security, and availability. They also work closely with data scientists and analysts to optimize data retrieval and deliver insights. They may also handle data migration and integration tasks.