Slow applications lead to frustrated users, particularly in peak times, where decisions need to be made in microseconds, not seconds or even milliseconds. It is crucial to keep the performance of the Node.js application healthy, especially when scaling it up. In this talk, you can find out how to improve Node.js performance, focused on caching and real-time stream processing using the Hazelcast open-source platform. You will learn how to accelerate your Node.js applications by building a multi-layer cache for your applications, and query JSON data at speeds far surpassing traditional document stores, how to deal with high load for view or like events, and how to prevent races when accessing 3rd-party services. The talk will include a demo application and the code will be open source and hosted on Github.