A Data Migration Developer specializes in transferring data between various types of storage, formats, or computer systems. They design, implement, and manage the processes involved in data migration. This includes understanding source data, defining data mapping, creating scripts or tools for migration, and ensuring data integrity post-migration. They also need to resolve any issues that may arise during the process. Their role is critical when organizations upgrade or consolidate systems, move to a new platform, or merge with other companies. They play a crucial role in minimizing downtime and data loss, ensuring seamless business operations.