Integrating Unity and React Native for ios

Lovely developers!
I am looking for a mobile developer to integrate unity to React Native for ios version.
Currently, I want a demo app and it is very simple.

For example, when the user clicks the button of react native, it should be called the unity part. then it should come back react native app if the user click the back button.

This is a very big project with long-term. so I will work with him for 6 months and pay developer 2000EUR per monthly when the demo app be perfect.

I don't want a new developer and it really needs to many experiences of unity and react native.

I would like him to show me a sample app and experiences.


Best Regard