I enjoy coding in Kotlin (I wrote this capsule's server in Kotlin in January 2025).
I initially proposed to do just part of the spec, definitely not mess with TLS but I ended up obsessing a bit about it so I have an almost full implementation of the comms protocol. However, I am yet to implement client authentication.
My take on Gemini Chess! (single shared board for now)
Let's Encrypt in JVM... what a pain