Other than Laravel (PHP), Python and Erlang (then Elixir), there's not much to try that's applicable. You'll be pleasantly surprised to see that your Erlang implementations are orderS of magnitude smaller (codewise) than your Java implementations, with different performance hurdles. Try new dbs like Redis or new messaging primitives like ZeroMQ. Find a basic analytics package like Munin or RDDTool.
I'm disappointed by the suggestions on this list, which is an ear full of bad advice. elm, kernel, julia? At least Lua is something that you will run into as an option, from time to time. That being said, you don't need to practice it. It's easy to treat it like a dumber version of javascript and you're fine.
Other than Laravel (PHP), Python and Erlang (then Elixir), there's not much to try that's applicable. You'll be pleasantly surprised to see that your Erlang implementations are orderS of magnitude smaller (codewise) than your Java implementations, with different performance hurdles. Try new dbs like Redis or new messaging primitives like ZeroMQ. Find a basic analytics package like Munin or RDDTool.
I'm disappointed by the suggestions on this list, which is an ear full of bad advice. elm, kernel, julia? At least Lua is something that you will run into as an option, from time to time. That being said, you don't need to practice it. It's easy to treat it like a dumber version of javascript and you're fine.