Web Engineering is the process of designing, developing, and maintaining web-based applications, websites, and web services. This involves a variety of skills and technologies, including front-end and back-end development.

Front-end development refers to the creation of the visual and interactive elements of a web application or website. This includes the user interface (UI) and user experience (UX) design, as well as the programming languages and frameworks used to create the front-end components. Front-end developers use languages such as HTML, CSS, and JavaScript

Back-end development, on the other hand, refers to the creation of the server-side and database components of a web application or website. This includes the programming languages and frameworks used to create the server-side logic, such as PHP as well as the databases used to store and manage data, such as MySQL. Back-end developers are responsible for creating the logic that drives the web application, as well as managing data and ensuring that the application is secure and scalable.

Together, front-end and back-end development make up the full-stack development process. Full-stack developers are skilled in both front-end and back-end development and are capable of building complete web applications and websites from start to finish.

In summary, web engineering involves both front-end and back-end development, with front-end developers creating the visual and interactive elements of a web application or website using languages such as HTML, CSS, and JavaScript, and back-end developers creating the server-side and database components of the application using programming languages such as PHP, Python, Ruby, and Java, and databases such as MySQL, PostgreSQL, and MongoDB. Full-stack developers are skilled in both front-end and back-end development and can build complete web applications and websites.