You could write a project-finding app using JS and Ruby/Elixir/JS for the backend I'm thinking of scraping GitHub, Bitbucket, HackerOne, etc for metrics that c

You could write a project-finding app using JS and Ruby/Elixir/JS for the backend I'm thinking of scraping GitHub, Bitbucket, HackerOne, etc for metrics that correspond to projects that a) need help and b) need the kind of help you'd want to give. This is the problem you're staring at right now, so you're already interested in solving it.