In this chapter, we covered the process of creating a Twitter app in the Twitter developer's console. We got familiar with the state management of the frontend using the pure functional programming library, Redux. We also added Filter List (similar to a To-do List) functionality to our app and went through the complete list of items, CRUD using Redux's store state and the React internal component's state.

On the backend, we created a stream of tweets by location; then, with the specified filter by the user, we parsed each tweet and we ingested the tweets into MongoDB based on the findings. We also performed sentiment analysis on each matching tweet and all score results and tweets were pushed in real time to the user with the reactiveness of Meteor.