Super App & Web Phased Development

I want to build a super app & website . First would be website building. The Super App is like Grab & Touch & Go. & WeChat & Uber & Lalamove & Mudah & Alibaba & Property Guru & Airbnb & Locanto & Carousel all integrated together to form a powerful super duper app... (Budget: $250 - $750 USD, Jobs: API Development, Artificial Intelligence, Data Management, Google App Engine, GraphQL, Mobile App Development, Payment Gateway Integration, Payment Processing, RESTful API)