A High Volume Websites developer designs, builds, and maintains websites that can handle a large amount of traffic. They optimize website performance and scalability, ensuring fast loading times, smooth user experience, and stability even under heavy load. They use various technologies, programming languages, and databases to build robust and efficient systems. They also monitor website traffic, identify any issues or bottlenecks, and implement solutions to improve performance. Furthermore, they work on server-side scripting, client-side scripting, and database architecture to manage high data volumes. They also ensure the website's security and implement updates and enhancements.