Hello! I wanted to know where I can find any tips on collaborating with backend service providers. If you have any relevant experience, be welcome. Thank you.
Have you tried to ask through your colleagues? Because the most approppriate options are often found among people who are working in the same field as you. There’s a tech issue magazine that would be useful to you - https://hackernoon.com/top-ios-iphone-mobile-app-development-companies-7b14a5e62de. Check it up.