Hello,
As per your requirement, that you need a Buying/Selling application
I’m Rohit, I am the senior developer in my Company we are over 80+ developers here.
I have a team of 15 developers who can work on your project. Flutter /Async Redux / Firebase are all familiar to us. Flutter, React Native, Ionic, Xamarin for Hybrid and Objective C, Swift, Java for Native are all graduated programming languages in my team.
Initiate a Chat So that we discuss more regarding your Application in the chat window
Regards
Rohit Soni