A Microsoft SQL Developer designs, implements, and manages SQL databases. They create and manage database objects, perform database tuning, and ensure data security. They write and optimize SQL statements for data access and retention, troubleshoot issues, and ensure data consistency and integrity. They work closely with other developers and stakeholders to gather requirements, design solutions, and deliver high-quality, efficient, and scalable database systems. Their role also involves developing and testing backup and recovery plans, updating database structures, and conducting performance tuning. They also provide technical support and training to users, ensuring smooth and efficient database operations.