A modern programming language that makes developers happier.

kotlinlang

I've written a lot of Spring Boot guidance for both java and kotlin at work. I maintain a Spring Boot starter that sets a lot of our in-house standards up and saves a mountain of time. As for Kotlin, I have some guidance but not a ton of it yet. We try to let teams do what they want at the language level, but we still have a lot of java-in-kotlin folks on our teams. Teams can pick and I'd guess we have 65% Java and 35% kotlin, and in the Kotlin group there are probably a couple of people who really get it and the rest are very open to feedback thankfully. We'll get there.