Flutter + Node.js Work and some AI Work Needed

I need like Coach Surfing web + mobile app. https://www.couchsurfing.com/ I have an existing Flutter mobile application that already communicates with a Node.js backend. I now want to push it further:... (Budget: $2 - $8 USD, Jobs: AngularJS, API Development, Express JS, Figma, Flutter, MongoDB, Node.js, NoSQL Couch & Mongo)