Python mostly, and Java if you are using Flink. We do both. The thing with Scala is, it's mostly linked to Spark, and then probably a good portion of the gigs out there using Spark are using Databricks, and Databricks is pretty expensive, so people are moving away from it. At least this has been my case for two companies -- one moved to self-host Vertica and the other is about to move to Flink.
Java (+Kotlin) for Android, Python for its automation and tooling (and obviously, data.) These aren't very low-level - For Android there is always C++ if you want to go down to metal.
Ah that's interesting. And there is ofc Swift and ObjC for Apple devices. Maybe I should get into app dev.
Thanks. Do you think there is a strong market of Android/iOS native app development? As a DE I don't think my previous experience worths much -- maybe a bit more when we move to Flink which uses Java, and the might would rather hire new graduates instead of me.