A database developer designs, implements, and maintains databases. They ensure data remains consistent across databases, optimizing database performance through indexing and other methods. They use programming languages and tools to write queries and scripts, creating interfaces and data reports. They also handle data migration tasks, database upgradation, and security measures. Their role involves developing database structures according to business needs, testing them, and making necessary changes. They collaborate with other developers and data analysts, translating data solutions into technical designs. They often work in sectors like IT, finance, healthcare, and more, where massive data management is necessary.