Ask HN: how do mobile developers find clients?

I started a small dev shop with a group of friends in NYC. We are 3 developers - we do APIs in Ruby or Scala and native iOS development. Our backgrounds are strong, and we have worked on some cool projects together and individually.

Since the summer we have had two bigger projects. Those clients are happy, but the work is winding down as we come to completion. They were both from previous connections that we had.

We are finding it hard to meet new clients for bigger projects. Is there a typical way to find clients? I go to meetups around NYC, but that doesn't seem to lead to anything.

Any advice would help.