Back-end development refers to the part of web development that deals with the server-side of web applications. Back-end developers are responsible for building and maintaining the technology behind websites, applications, and software that supports the front-end user interface.
Back-end developers work with databases, servers, APIs, and various programming languages such as PHP, Ruby, Python, Java, and .NET, to name a few. They are responsible for developing the logic and algorithms that power web applications, and they work to ensure that data is stored securely and accurately.
Back-end developers work closely with front-end developers, who are responsible for the client-side of web applications, to ensure that the application runs smoothly and efficiently. They also collaborate with designers, project managers, and other stakeholders to ensure that the application meets the needs of the business or organization.
Some specific tasks that back-end developers may be responsible for include database design, server-side scripting, API development, security implementation, and testing and debugging of the application.