A Back-End Web Developer is responsible for server-side web application logic. They usually write the web services and APIs used by front-end developers and mobile application developers. Their work involves databases, scripting, and the architecture of a website, ensuring the server, server-side applications, and databases run smoothly together. They create and maintain the core computational logic of a website, the data storage solutions, and also ensure that front-end developers can plug into their work effectively. Essentially, they manage everything that users don’t see directly, but that makes the website function seamlessly: data management, server connection, and more.