A LAMP developer works with the LAMP stack, which includes Linux (operating system), Apache (web server), MySQL (database), and PHP (programming language). They are responsible for designing, developing, and managing dynamic websites and web applications. Their duties include creating database structures, building server-side applications, designing user interfaces, and ensuring optimal performance of the website or application. They also troubleshoot and fix bugs, maintain code, and implement security measures. Additionally, they may collaborate with other developers, clients, or users to understand requirements and provide technical support. They must stay updated with the latest technologies and trends in web development.