I mean at the time like five years ago I just literally opened LinkedIn, searched for software engineering jobs, and did a tally of the first 200 jobs or so on a piece of paper. About 50 were C# and 50 were Java, and then a mixture of other stuff.

Pretty low tech but it got me a job. I came from a background of doing Elixir and Node.js backend which if someone recognized Elixir seemed to get me brownie points for doing something interesting. I guess whatever site you’re using to look for job listings you could do the same.

Looking at Meetup group membership / attendance used to be a pretty good gauge.

Job listings in your local area