An LDAP (Lightweight Directory Access Protocol) developer designs, implements, and maintains applications that interact with directory services. They create software to access and manage data from LDAP servers, which store hierarchical data structures, often used for user authentication and authorization. The developer ensures the software's efficient and secure interaction with the LDAP server, handling data like users' login credentials, permissions, and personal information. They also troubleshoot issues, provide technical support, and often need to understand related technologies like SQL, XML, and networking protocols. Overall, an LDAP developer plays a vital role in managing access control in networked environments.