Flutter & React native expert needed

Hello friends, i need a team of developers who can work on flutter & react native apps and can handle backend as well, if anybody experienced can apply..... I need for long term because i have many more projects in future as well and running some projects already.........
Rest details i will provide by private chat, what i need experience on
#) Audio/Video calling apps
#) WebRTC or third party Api's
#) Dating apps as well.

Developer should have experience on that platforms....