People here might not notice - your link is the official client interface for talking to KDB+ processes from Java.

There's a decent chance your broker (or their dealers) are using stuff built on this.

It's interesting to compare that version from 2017 with the current version from 2025: https://github.com/KxSystems/javakdb/blob/9a94dc5af9288fe845... — the current one is over ten times as long in terms of number of lines, and has copious comments, but still has the short names and dense code.