Dear, sir.
I'm a skilled C/C++, Android/Flutter(Dart)/React Native, Google Firebase, Python and .NET/C# developer you are looking for.
I've read your project description and I am very confident with your task.
My C/C++ experience is 15+ years and the experience of PHP, Java/C# and Android/Flutter/React Native is over 7 years, so it will be very perfect for your project.
If you give me a chance to work for you, I can give you full satisfaction related with this project due to my high skills and responsibility and can provide you many services like full-time working, enough communication and discussion.
I want to know and discuss about this project more details via CHATTING.
Kind regards.