What's a good modern Java web stack?

Hi

I'm currently working as Java developper in a company. We work with "old" JEE structure (tomcat 6, basic JEE, sometimes hibernate but that's all).

For personal projects I work essentially with new javascript tech (Node.js, VueJS etc)

I've seen lot of interesting things about new tech on Java : Vert.x, Kotlin... I am thinking to spend more time to study them and maybe speak with my workmates for using it!

If you have to use modern technology for creating a basic JVM based web app, what would you use? (vert.x, kotlin, spring, groovy ... which ORM ? ). All your ideas are welcome !

Thanks!