[ufmace]

Creating a site like that is straightforward enough, and lots of people have done it. The hard problem is the market - how do you filter/rate clients by who can come up with a reasonable, practical project and will pay market rates without being overly difficult about anything? How do you filter developers by who can execute a project in their advertised languages and frameworks, estimate it accurately, and finish it on-time and on-budget to professional quality standards? I wouldn't bother unless you have some practical-sounding idea for how to fix that.

[mooreds]

Good points. That said, all these issues are faced by sites that focus on full time employment.

I am definitely interested in part time development work, and am not aware of any sites that have that as their main differentiator.

OP, it'd be interesting to see this site up and running. However, I'd think carefully about what kind of part time work you are trying to have listed on the site:

   * project based (which may spike to more than 40 hrs/week, but only lasts for 3 months)
   * retainer (I want 10 hours/week forever)
   * employment (I want to hire someone who is willing to work for 15 hours/week)

Part time work is harder to find because there are certain fixed costs of managing labor, and it's nice if you can amortize those across as many hours/week as you can, but as a contractor it helps me have more than one opportunity to earn income at one time.