Mpesa-Enabled ISP Billing System

I need a complete, web-based ISP billing system that mirrors the workflow and look-and-feel of https://reatechbilling.com/. My priority is a smooth Mpesa integration so customers can pay invoices directly through Safaricom’s API, both for one-off and recurring charges... (Budget: $30 - $250 USD, Jobs: API Integration, Database Design, JavaScript, Laravel, Node.js, PHP, Web Application, Web Development)