[corroclaro]

IIRC, Klarna is mostly written in Erlang, Scala and some parts in Clojure.

If someone should be aware of thread-local storage and its implication it ought to be them.

[K0nserv]

I was under the impression that they had switched to Java more in recent years

[def_true_false]

Using trendy tech doesn't solve much by itself. Especially if you can't (or don't) compete with FAANG on compensation.

[sidebits]

This has changed many years ago.