A CFML developer uses ColdFusion Markup Language (CFML) to create web applications and services. They write, test, and debug code to build dynamic, database-driven websites. They also work on the server-side to manage databases, improve site performance, and ensure security. They may develop email services, data recovery features, and search functions. They often collaborate with other developers, designers, and clients to ensure the website meets the desired specifications and user needs. Additionally, they may be responsible for maintaining and updating existing web applications, fixing bugs, and improving functionality.