So when judging someone's work remember to factor in whether or not it was an actual project meant to go live.
My funnel looks like this: -reach out to about 50 designers -15 of them are open to coffee -1 of those 15 are open to an interview
Note about freelancers: they tend to like the lifestyle that freelance provides. I've had luck with hiring on freelancers as part time contractors that actually show up on site, then gradually convincing them to join up full time.
2. Become clear if you want somebody remote or on site, freelance or fulltime.
3. Start looking for your ideal candidate trough - your social reach (people who like what you are doing already) - your network (2nd and 3rd level connections on linked in) - go profile hunting on designer pages like Dribble, behance 99Designs, etc. to find a style "you like" if it is about visual design - approach them, duh ;-)
Hope that helps?!
PS: I am currently writing a how to guide to find and hire UX Designers [1]. If you want to see the draft and give feedback just send me an email (see profile)
I'm a product designer in SF, and I work with many amazing designers. I can say that the vast majority of us are not publishing on Dribbble, Behance, etc.
I would recommend posting jobs on Dribbble, however. That's probably the first place I would go if I were looking for a new gig.
Designer News and Angel List are popular. Also Stack Overflow and GitHub for the more technically-oriented designers.
Lastly, I'd recommend word-of-mouth on Twitter. The design community there is pretty robust.
The other I found by just being friendly at a coffee shop. He was working there at the time. I have collaborated on a number of projects with him since we first met in 2012.
Find a style you like and hire the designer.