A Graph Database Design Developer designs and implements graph databases, which store data in a graph structure. They create nodes (entities) and edges (relationships), allowing complex hierarchical data structures to be efficiently stored and retrieved. They work on optimizing database performance, ensuring data integrity, and developing data models that can handle large volumes of data. They also create algorithms to analyze and interpret complex data relationships. Their work involves close collaboration with data scientists, software developers, and other IT professionals. They may also be involved in data migration, database troubleshooting, and system security measures.