A Back-End Developer is a professional responsible for designing, implementing, and maintaining the server-side logic of web applications. They work with databases, server scripting, and APIs to ensure the functionality and performance of the application. Back-End Developers focus on server-side architecture, business logic, and database management, ensuring that the application's front end and user interface seamlessly interact with the server.Proficient in programming languages such as Python, Java, Ruby, or Node.js, Back-End Developers create the logic that powers the server, handling data storage, user authentication, and application scalability. They collaborate with front-end developers and other team members to deliver robust, secure, and efficient web applications. Back-End Developers play a crucial role in shaping the core functionality and performance of websites and web applications, contributing to a seamless and responsive user experience.