A Database Design Developer is responsible for creating, managing, and optimizing databases to meet user needs. They analyze data requirements, develop data models, and design database structures. They also ensure data integrity, security, and performance by implementing appropriate access controls and optimization techniques. They work closely with other developers to integrate databases with applications, troubleshoot any issues, and make necessary modifications. Additionally, they often document their design processes, create database reports, and maintain updated knowledge of emerging database tools and technologies. Their ultimate goal is to ensure efficient and effective data management.