A CRUD developer creates, reads, updates, and deletes data in a database, typically through a user interface. They design and maintain software applications, ensuring smooth data handling and storage. They also ensure data accuracy, prevent data loss, and protect sensitive information. They work with various programming languages and database systems, and often collaborate with other team members to integrate their work into larger projects. They troubleshoot issues, implement new features, and optimize performance. They also test their applications, making sure they work properly under normal and peak loads, and often have to document their work for future reference.