What language should I learn and use in order to develop a mobile app to prove to my CTO that I can be a software engineer?

1

React Native

If you want to build a mobile application quickly then you should look into React Native as you can use it to build cross-platform apps with a shared codebase. https://reactnative.dev/.

#Development Tools #JavaScript Framework #Javascript UI Libraries 212 social mentions

2

Firebase

For the backend to store the app data and do authentication you can use Firebase https://firebase.google.com.

#Developer Tools #App Development #Backend As A Service 246 social mentions