What sets the Ruby developer apart from other developers is his or her preferred language: Ruby. This language, with its simple harpoonable syntax, is mostly easy for developers to use, but few people learn how to use it. However, many companies, such as Twitter, use it.

On a daily basis, the Ruby developer therefore uses this language in an open source framework: Ruby on rails most of the time. His goal is to develop web applications according to the specifications provided by the web project manager. But his missions are not limited to that: he is also present during the testing stages and it is not uncommon for him to have to fix bugs and other technical problems on the application he has created.

Like any software engineer, the Ruby developer has to understand, identify and evaluate the client's needs to offer specs that will meet the client's requirements and follow their budget. After this evaluation stage, it's time to move on to the development stage! This is the time when the Ruby developer will take care of the architecture of the application or site in order to develop its technical features. This is really where the Ruby developer's advanced skills take place.

Once solutions are developed, the Ruby developer must ensure that what he or she has created is functional and must train the client in the use of the application or site in question.

Ruby developers don't bivouac at the web, but use the Ruby language to develop games or web, mobile applications. This shows a certain versatility in the developer's job. Ruby developers must have a strong knowledge of programming, but they must also be fast and autonomous. When one of the customers faces a problem, the Ruby developer is obliged to provide a solution very quickly. In addition, the Ruby programming language is constantly evolving, so the ability to self-train must be added to this. Like any self-respecting developer (and who has the ability to do so!), the Ruby professional must stay abreast of the latest advances in terms of applications, technologies, and technical innovations.

The Ruby developer's job requires 2 to 5 years of university training in web programming to provide a good base of programming languages and then to train oneself in Ruby with online tutorials. 

You should also know that the Ruby community is active on the Internet: you will have no problem finding help if you encounter problems coding in Ruby.

Even though learning the language has become very popular (especially through its very active community), Ruby developer profiles are quite rare. In fact, most of them are enthusiastic self-taught people who learn the language out of curiosity. It remains less learned in web schools or engineering schools than the languages Java, C, C++, or PHP.