In this talk we will deep dive into Kotlin multiplatform projects. We will cover why you should consider using it, compare it with other cross-platform solutions. how it is different than regular Kotlin projects and how to use it to level up your product development. We will show a simple project that includes Android, iOS, Web (React) and Desktop clients. Then we will demonstrate how Kotlin makes it easier to inject platform specific logic into shared code. We will conclude the talk with limitations and challenges we faced during development.