Ask HN: How to find a remote client based in the US?

We have a small software development company based in Europe, about 10 developers with 5-10 years of experience in mostly fullstack product development projects, JVM+React/Angular tech and customer development with lean methodologies. We are thinking of looking for clients outside of Europe, mainly in the US. Not for any particular reason other than interest in what US has to offer. What would be the best way to start gathering leads? Any good sites or communities to look for?