If you want to hire a truly professional designer, it makes no sense to post a vacancy and wait for applications. This is undoubtedly the case when a portfolio outweighs any CV. Therefore, start searching proactively on such websites as Dribbble and Behance.
Here is our hand book with the guide on how to source designers using both websites, which have proven effective when searching and evaluating design works. To find the top range professionals, it is important to have a clear idea of how these platforms work.