What’s the best way to hire reliable remote English-speaking talent for outbound sales?

Hi everyone! I’m looking for advice from business owners who have experience hiring remote English-speaking talent for outbound calls. I’m building a role focused on speaking with clients, explaining products or services, answering questions, and maintaining a professional tone. What hiring platforms, screening methods, or interview questions have worked best for finding reliable candidates with strong spoken English and some IT or online-platform experience? I’d also appreciate any lessons you’ve learned when building a remote customer-facing team.