Let’s be honest — resumes and portfolios don’t always tell the full story. With new tech stacks popping up every few months, knowing how to hire mobile app developerwith the right technical mix is becoming tricky. Should you prioritize React Native expertise, backend scalability, or UI precision? Maybe all three. But testing real problem-solving ability often reveals more than any credentials can. How do you screen for genuine skill — live coding tests, small pilot projects, or referrals?