In this talk, I will introduce the highlights of what to look forward to in Scala 3.9 LTS, as well as how to think about the upcoming new release.

The new Scala 3.9 LTS is planned to arrive in Q2 2026. With it, a wave of significant changes will soon flood the Scala ecosystem. Numerous language features, a new runner, a revamped REPL, bumped JDK, the list runs long.
In this talk, I will introduce the highlights of what to look forward to in Scala 3.9 LTS, as well as how to think about the upcoming new release. I will summarise the changes since 3.3 LTS, unpacking some of the development history. I will also talk about 3.3 LTS ongoing support, JDK compatibility and other things you might wonder about, thinking about Scala going forward.
This talk presents McCCT, a new concurrency testing tool developed at KTH by the speakers in the context of an ongoing research project.
So, is there a modern solution for web apps that is powerful, simple, and blazingly fast in both CI and the browser? A solution that lets you write in your favorite backend language and is fun? The answer is Datastar!
In my talk I will argue that we can do much better by relying in a systematic way on types and capabilities.
In this talk, I’ll guide you through the crossroads where Scala intersects with AI, some applications aimed at boosting developer productivity, others focused on integrating your code with LLMs.