In this thesis, we presented the Go programming language, listed various concepts and specific Go packages that implement them and facilitate the development of web applications. First, we introduced the syntax and data types in Go. After that, we saw how Go differs from other popular languages in its approach to object-oriented programming and parallel programming. We then went through setting up and managing the development environment and packages. Next, we highlighted the gin development framework as one of the possible packages for server infrastructure development. We focused on user authentication and session development with the help of JWT tokens. We have shown how we can use SQL and the sqlc package to manage the model and business logic, unlike the usual solutions based on the ORM concept. We also mentioned the importance of configuration variables in different environments in which the application can work. In the last chapter, we also presented the developed application and a simple WebSocket server with the help of which we implemented the feature of sending messages between users.