Ask HN: How to hire iOS developers?

I am looking for a firm or individual that can rapidly produce simple apps for consuming content.

We are primarily a content company with a small tech side that maintains the website (a main revenue stream) and produces custom content platforms for partners.

There is a large demand for partners to provide co-branded applications with our content (images and text). We don't have the resources or talent to do it in house.

I need to find and vet the outside help for this, but I don't really have any knowledge on the subject.

A couple quick google searches didn't yield me a database of developers/firms looking for work; and I'd really like to stay away from generic resume sites.

It's probably worth noting most of these applications will be very simple: collecting user-entered data, displaying lists of content, and displaying that content.