For hiring app developers, businesses must consider factors such as experience, expertise, portfolio, communication skills, platform knowledge, and work ethics.

Check platforms like Stack Overflow, GitHub, and other developer forums to read over the projects they’ve done and clients they’ve worked with, to determine if they’re a good fit.

Following are some of the questions you can ask your mobile app developer during the interview process: How many apps have they developed? What programming languages have they worked with? What is their testing process after creating an application?