https://old.reddit.com/r/volunteer/comments/etjcst/looking_for_contributors_to_lemmy_an_open_source/
https://old.reddit.com/r/TeamItUp/comments/etjihy/looking_for_contributors_to_lemmy_an_open_source/
Hopefully this gives some much needed publicity to the Lemmy project, and attracts some contributors.
Reddit alternatives might be a good place to post too, but I see it already has a post about Lemmy.