Ask HN: How to recruit video chat app hackers?

I have experience looking for fairly "standard" sets of web skills, but my company is now in a position where we need to build a native two-way video chat application. This goes outside my area of expertise, from both a technical and a procedural perspective. The app we're building is really cool and very unique, and we need to build a top-notch team to pull it off. I've done a quick scan of the major job boards for representative examples, but haven't found anything. Is this an uncommon need? Any advice from the HN community?