In this talk, you'll learn about how we successfully rewrote the website of a major scientific publisher to pure Kotlin, serving millions of daily requests and in the process created the open source http4k microservice toolkit.

The talk also covers how the team migrated the stack to Continuous Delivery-based deployment into a private on-premise cloud, and how http4k helped us introduce new failure-mode and inter-service contract testing techniques.

This approach combines functional programming concepts and the versatility of Kotlin to produce applications that are simpler and more testable than most Java are accustomed to experience. And the best of it: with absolutely no magic!