I'm a (full stack javascript) contractor and have started getting a call a week asking if I would consider relocating to Berlin or Frankfurt.
* HERE (I work there, let me know if you want a referral)
* Amazon
* SAP
* Zalando
* SoundCloud
* Fyber
I probably forgot a few others and many smaller startups hiring Scala devs.
The tech landscape is different (not a lot of fin tech, no hedge funds, no algo and high frequency trading like in London) but the opportunities are plentiful.