How do you define a professional app developer in today’s market?

[rileywebster]

Hi folks, we’ve been working across different services like iOS, Android, and cross platform solutions, learning from each project and trying to grow with the industry. Along the way, I’ve often wondered what really makes someone a professional app developer? Is it their technical expertise, creativity in solving problems, or the way they deliver long term value? From your side, what do you think truly separates the best app developer from the rest?