"Five to seven Learn Kotlin with us: www kt academy VISIBILITY MODIFIERS Modifier Class members Top ">
You can learn Kotlin as your first language, without knowing any other language.
I'd say it is helpful to know but I wouldn't say you have to know.
What may end up happening is that you will sooner rather than later be dealing with libraries that were written in Java.
The estimated duration of this course is two weeks, and the ideal skill level is intermediate.
It means that your learning experience would be best if you have at least some knowledge of programming in general and familiarity with the basic OOP (object-oriented programming) concepts.
If you can solve a coding assignment using Kotlin and then demonstrate good problem-solving and communication skills in your interview, a company might be willing to take you on, even if they don't use Kotlin.