hello mate
I've come across your descirption that you are looking for flutter/dart developer. I can develop your group chat application. I am glad to tell you that I've 1.5+ years of experience in flutter development & 5 + years of experience in android & ios mobile application.
**Please have a look at my question:**
a. Do you want only group chat or calling facility as well?
b. Do you want to integrate attachments, documents, locations, contact sharing as well on group chat?
I've also knowledge in native android(java, kotlin), native ios(Objective C, Swift) & hybrid (React-native, ionic), Cross platform(Flutter), 3rd party integration, api integration, (MVC,MVVM, MVP) patterns knowledge in android & (MVC, MVP) pattern knowledge in flutter.
Let's come over chat so that we can start it immediately.
Thanks & Regards
Vikas