implement agora.io, paypal and firebase

ios Swift. I'm willing to start negotiations at around 200$ I'm looking for a programmer who has already programmed videochat and payment gateways or who wants learn. I need to use [login to view URL] (videochat) and paypal. There should be a sign in - sign up for firebase, a profile screen, a user list, and video chat request. here's the design sequence as picture. Very simple UI for now. [login to view URL] In this there are two different kinds of users... I need these core feature implemented.. 1. student searches list of tutors who are active / online 2:tutor s selected from the list by student then their profile appears **tutor is alerted that student is requesting them. 3: student pays tutor 4. videochat starts / ends 5: after the videochat the users review each other [login to view URL] videchat paypal - user to user Firebase