Node.js REST & GraphQL Integration

I have a mature JavaScript / Node.js codebase that now needs robust API connectivity. The goal is to wire in several external services—some exposed as classic REST endpoints, others as GraphQL—so the application can consume, transform, and surface that data seamlessly to the front-end... (Budget: ₹400 - ₹750 INR, Jobs: AngularJS, API Development, Documentation, GraphQL, JavaScript, Node.js, NoSQL Couch & Mongo, REST API, Software Architecture, Software Development)