Best Platforms to Hire iPhone App Developer Online?

Hey everyone, I’m looking to hire iPhone app developer online, but with so many platforms out there, I’m not sure which one to trust. I need a skilled developer who can build a high-quality app with a smooth UI, great performance, and scalability. Which platforms or websites would you recommend for hiring a reliable iPhone app developer? Have you had any personal experience with freelancers or agencies? Also, what should I look for in a developer to ensure they deliver a top-notch app? I’d appreciate any insights or recommendations before I make a decision. Thanks in advance!