A Data Structures Developer designs, implements, and manages data structures to ensure efficient data organization and storage. They work on algorithms, databases, and systems to optimize data retrieval and data manipulation processes. This involves creating data models, addressing performance issues, and developing strategies for data storage. They also solve complex problems using data structures like arrays, stacks, queues, linked lists, trees, and graphs. They must possess a deep understanding of programming languages, memory management, and computational complexity. In essence, their role is to ensure efficient data handling to improve and streamline software applications or systems.