An Auto-tiering developer designs, implements, and manages systems that automatically move data between different storage tiers based on its usage. They work with storage solutions like SAN or NAS, employing algorithms to analyze data usage patterns. The goal is to optimize storage, ensuring frequently accessed data resides on high-performance tiers, while less accessed data is moved to lower-cost storage. They also troubleshoot and resolve storage-related issues, ensure system security and efficiency, and often collaborate with other IT professionals to integrate storage solutions. Continuous learning about new storage technologies and data management best practices forms a crucial part of their role.