Hi, I'm a backend developer, have been developing financial (banking, cards, e-transfer, e-commerce) software since 2006 in Java, currently mostly writing Kotlin and a bit of Java 8 (90/10% K/☕ ).
Joined this channel just because I'm interested in science (popular science level, mind you) and got curious about Kotlin used in the field.
Regarding graphing, I haven't heard about anything Kotlin specific, but Java offers many possibilities and all of them can of course be used from Kotlin. There's also kotlin-native which opens the world of native libraries and tools, although native is a bit rough around the edges still, still JNA can be used instead, same as from java.