As wallflower pointed out there are plenty of ways. If I needed to find someone I would ask here (HN) as you said on a job offer. Anyway, I'm a developer and I'm looking to do apps to create a more concrete resume and experience, if you need more information I have a thread here https://news.ycombinator.com/item?id=6077474

By the way, don't use approach 0 (spam everyone on LinkedIn) it's horrible.