webapplog [tech blog] Book author Azat Mardan writes about apps, startups and technology Note: This text is a part of the Express.js Guide: The Comprehensive Book on Express.js. The HackHall project was written using Backbone.js and Underscore for the front-end app, and Express.js, MongoDB via Mongoose for the back-end REST API server. Example: The HackHall source code is in the public GitHub repo