Hey There,
I have read that you need flutter developer for your design,
I am happy to say you that i am full stack expert having 6+ years of experience
Mobile apps and websites development, i can develop
any type of application for you, there are many chats application i did and i also worked
in video calls and voice calls app, you can hire me without any worried to start work,
I will wait for you response, so that we can discuss more details over chat, thanks in advance.
You can check my profile review of past work here
https://www.freelancer.com/u/zeeshan5121472