Add Auth & Razorpay Checkout

My site’s front-end is already live; what I need now is the engine that turns it into a real store. 1. Authentication Visitors should be able to register or sign in with their existing Facebook or Google accounts... (Budget: ₹600 - ₹1500 INR, Jobs: API Development, Backend Development, Django, JavaScript, Laravel, MySQL, Node.js, Payment Processing, PHP, Software Architecture)