SMS Portal Gateway Development

First off start all reponses with the following : -That you understand clean code is a requirement. - you can work with springboot , react and postgres I want to create a sms portal similar to [login to view URL] -I will take over all source code when completed -I have the api created required to be called What is required: - a web portal similar to above for reference (please log in and check before contacting me ) -a payment gateway -Login/logout/forgotten password/signup -variable pricing for topup -all features currently seen on this site. Please leave detail ,I am a developer myself and wish to get someone to take this project as i am busy with others , Please detail how you will develop this in detail so i can check.