A lot of Scala is written to be that scaling code, see Spark. I know your point was the possible hand-off between teams, just wanted to indicate it is often used as that scaling language in data-processing.
Spark is not just written in Scala, they shared the same philosophy of underthought design.
Luckily, there's a little reason of using Spark after Yandex released their Clickhouse: it better compresses data, it is much faster, it doesn't need crazy infrastructure of low quality Apache's code, it can be used in a realtime which is really huge.
