A Client Server Technologies developer designs, develops, and implements client-server applications and software. They work with various programming languages and databases to create software that allows computers (clients) to connect and share resources with a central computer (server). They are responsible for ensuring smooth communication between clients and servers, optimizing server performance, and maintaining the security of the system. They also troubleshoot any issues that arise and update or modify the system as needed. Additionally, they may be involved in system analysis, testing, and documentation to ensure the software meets the specified requirements and quality standards.