If you want to hire growth hackers for your business, you have to know where to find them, so here are a few places you can try:
The easiest way to find growth hackers is to search for them in communities. Connect with the members who engage the most and provide value because they are most probably the right people for the job.
Blackhatworld.com is a great place to find veteran growth hackers. Although their services can be pricey, the results you'll see are worth every penny. However, you'll only find growth hackers who work on a project basis.
Bootcamps are a great source of talent. Many Bootcamp instructors will offer their students to do the job for you.
Reach out to growth hackers on LinkedIn who are part of an agency, and ask them for their services. It'll look like you're asking them to do a freelance gig that's unrelated to the agency, so they'll probably accept.