Travel Insurance Portal Backend Development

I already have a clean, responsive front-end for my travel-insurance booking site; now I need the complete engine behind it. Your job is to architect and code the full back-end layer, expose well-structured REST APIs, and wire everything to Indian payment gateways... (Budget: ₹37500 - ₹75000 INR, Jobs: AngularJS, API Development, Backend Development, HTML, Java Spring, Node.js, PHP, Python, REST API, Website Design)