[qsort]

Actually, as a Java dev, I quite like modern Java for data work. Streams + static typing make aggregating data a breeze.

I assume for more advanced work like the one OP mentions you'd still want to stick to Python because of the superior ecosystem, but I was pleasantly surprised by Java.

Can't believe I'm writing this, but I actually like modern Java.

[Zababa]

I've only followed Java from far away (last time I used it was Java 7 in college) but modern Java seem like a very nice language. There are also Graal, alternative ecosystems to Spring, good things like that.