[ryanmaynard]

Aside from HN, perhaps you could try:

* IRC Channels

* Twitter (search by profile contents and/or hashtags)

* Mastodon? Still a bit unproven, but the atmosphere there resembles the 90s web.

[ubersec]

mastodon has a few. try the tech instance or sec one

[ryanmaynard]

I forgot to add Lobste.rs