Hello sir/ma'am,
I work as an Mobile app and game developer as well as i personally manage my freelancer account.
I have few people under me who help me with backend API and UI design.
I can develop mobile apps on 3 platforms.
This is my individual experience of development on these technologies
1. Android Studio (exp 7 years)
2. Ionic (exp 5 years)
3. Unity (exp 2 years)
Now I am simultaneously working on these technologies and managing development team leading from front.
I hope to be useful for your task and soon we will be discussing more about your product.
Thank You
Keshav