In a crowded world of popular computer languages, platforms and ecosystems, Node.js is one of the hottest. According to w3techs.com, Node.js usage has gone up 241 percent in the last year alone. Retailers have taken notice and are implementing it on many levels. I am going to share the basics of Node.js, and discuss why retailers are using it to reduce page load times and improve server efficiency. I’ll talk about similar developments such as Docker and microservices, and look at several companies implementing these technologies. I’ll also discuss how mobile computing is changing buyer behavior and expectations.