cross platform social post frontend

I need someone who can build a frontend, which can do one click post to some of the social media platform, like posting copywriting, pictures, and videos etc, in order to promote my own service, we can use existing API wrapper, basically it is an aggregation of all different types of apis, the frontend will use for user interaction
you need to be an expert of:
react native
flutter
javascript, typescript
python
RESTapi
backend
MERN