Merge pull request #5 from Iterable/frontend-HWW

Update our-stack.md

Author: Joe Crawley

our-stack.md

@@ -5,3 +5,5 @@ Most of our code is in Scala and most engineers use the IntelliJ IDE. We use a h
 We run our production environment on AWS, with a bit of [redislabs](https://redislabs.com/), [CloudAMQP](https://www.cloudamqp.com/), and [Heroku](https://www.heroku.com/) as well. Most of our stack is deployed straight to EC2, but we're increasingly moving to [Docker](https://www.docker.com/) and [kubernetes](https://kubernetes.io/). We have a few hundred terabytes of [Elasticsearch](https://elastic.co/) running in self-managed clusters on EC2.
 
 We move a lot of data around in messaging systems. Today that is largely RabbitMQ and Kafka, but we are experimenting with [Apache Pulsar](https://pulsar.apache.org/) which we hope will replace both of these systems. Pulsar promises better performance and uptime than RabbitMQ, while allowing many more independent data streams than Kafka.
+
+On the Frontend, our engineers work primarily in Javascript(ES6+) with [ReactJS](https://reactjs.org/) and [redux-saga](https://redux-saga.js.org/). We transpile our javascript using [babel](https://github.com/babel/babel), and we use [webpack](https://webpack.github.io/) to bundle our assets. For styling, we use [postcss](https://postcss.org/) to preprocess our styles.