What industries use Ruby developers?

The most common industry using Ruby developers is the web application industry because Ruby is a language that communicates logic that controls a web application to a server. Many high profile web application companies, such as Airbnb, Hulu, and Basecamp, use Ruby on their backend. Typically, any industry that needs a backend language that translates through a server to a frontend language can use Ruby developers, particularly those who have experience with other server-side languages, such as PHP.