Zalando has probably surpassed Twitter as the biggest Scala shop for a few years now. If you look at Twitter's ecosystem you'll see that while it's mature, the

Zalando has probably surpassed Twitter as the biggest Scala shop for a few years now. If you look at Twitter's ecosystem you'll see that while it's mature, the style is very good overall and not so different from modern and opinionated FP libraries. Twitter used to employ people like Travis Brown for instance. Spark (and Kafka too maybe) are outliers here.