This bachelor's thesis details the development of a social network designed for writing film reviews. The term "social network" will be clearly defined including the history of social networks from their very beginnings, to the global phenomenon of today which is used by a constantly increasing number of users. The thesis also contains an introduction to the environment of the Ruby on Rails web application framework with an explanation of its capabilities. The large programming community gathered around Ruby on Rails has already dealt with numerous development issues, which greatly eases correcting any errors while developing the application. Using The Movie DB's database through their API is smooth and straightforward due to the examples found in the Git repository of The Movie DB’s gem package. The effectiveness of the Ruby on Rails framework is illustrated by its utilization in this thesis. Due to the easier installation of the Ruby on Rails framework, and the framework's initial predisposition towards Unix-based operating systems, this application has been developed using Ubuntu 17.04., distribution of the Linux operating system.