We at Spreadshirt have started to use the JVM language Kotlin in a couple of services. This ended up in great enthusiasm. Kotlin allows us to significantly reduce the boilerplate and to write more robust and readable code. In fact, I don’t want to write Java anymore. In this post I like to show you why.

Vaadin is a mature web framework for developing rich internet applications. Building web-based GUIs with Vaadin feels like developing a desktop application, which is great, comfortable and fast. However, there are situations where Vaadin is not suitable. In this article, we take a look at the architecture of Vaadin and point out its strengths and weaknesses. Let’s start.