Lately I’ve been crafting a small one-page app (job board) with all kinds of filters / faceted search. Inspired by this great talk with a nice Italian accent (slides and video) I took Flask / MongoDB and backbone.js for frontend. And was fully content with it until I found ElasticSearch that completely eliminated the need for api calls while filtering/searching: backbone can talk directly to elasticsearch server. ElasticSearch is awesome, can’t wait to tinker with it again on the next project.