Kotlin is a multi-paradigm programming language, which is becoming more and more popular. The language, which is still quite young, was released in 2011. It has become best known for being the language of choice for developing Android apps. The language is open-source, but the company JetBrains is significantly involved in the development.
Another special feature of the language is that it is fully interoperable with Java. Therefore, existing Java frameworks and libraries can be used. Kotlin is generally regarded as a modern, precise and secure programming language.