An IntelliJ IDEA developer utilizes the IntelliJ IDEA, a Java integrated development environment (IDE), for software development. They write and debug code, manage and organize project files, and integrate version control systems like Git. The developer uses IntelliJ's built-in tools for database access, code analysis, and testing. They also leverage the platform’s smart code completion feature, static code analysis, and refactoring capabilities to enhance productivity and code quality. Furthermore, they often use the IDE's support for various programming languages and frameworks beyond Java, including JavaScript, SQL, JPQL, HTML, and more.