What are the skills needed to become a professional app developer?

Some key skills that are typically required to become a professional app developer include:

• Strong programming skills, particularly in languages such as Swift (iOS) or Java (Android)
• Knowledge of mobile development frameworks, such as React Native or Xamarin
• Familiarity with software development concepts, such as object-oriented programming, MVC, and Agile development
• Familiarity with mobile development tools, such as Xcode and Android Studio
• Experience with version control systems, such as Git
• Understanding of mobile design principles and user experience (UX) design
• Good problem-solving and debugging skills
• Strong written and verbal communication skills, as well as the ability to work well in a team
• knowledge about cloud infrastructure, such as AWS or Firebase is a plus
• Experience with native/hybrid apps development, third-party libraries, APIs, and other external services

It would also be beneficial for an app developer to stay up-to-date with new technologies and trends in the mobile development industry.