A Knowledge Graphs developer creates and manages knowledge graphs, which are networked data structures that represent information in a graphical manner. They collect, integrate, and analyze complex datasets to build these graphs, making information more accessible and meaningful. Their work involves designing data models, developing algorithms, and using query languages like SPARQL. They also ensure data consistency, accuracy, and reliability. They work closely with data scientists and other stakeholders to understand their data needs, and utilize machine learning and AI technologies to enhance the knowledge graph's capabilities. Overall, they play a critical role in data-driven decision making.