There are a lot of possibilities to find a remote job. The only thing here is that you should be a professional, because your feedbacks influence your reputation and thus your potential work. Then you should be able to show your portfolio, like at your personal website, at various resources, which are meant for it. Sure thing every client would definitely make a research on you as a developer, that is why it is better to have a good reputation, good feedbacks (true, not fake), and a good portfolio.
Btw, we wrote a similar article (at https://mobilunity.com/blog/where-to-find-reliable-front-end...) on how to hire frontend coders, where we indicated the ways to find them as well.