I dunno about original poster but in Kotlin I use Javalin.io for HTTP web services and JDBI for SQL. Jedis for Redis access. These are pretty typical Java libr

I dunno about original poster but in Kotlin I use Javalin.io for HTTP web services and JDBI for SQL. Jedis for Redis access. These are pretty typical Java libraries, but lightweight. Nothing particularly Kotlin about them but that's why I like Kotlin because you can leverage the entire Java ecosystem easily. I find Kotlin on the backend to be a pleasure.