名だたる有名企業の事例だけでもこれくらいはすぐに出てくるわけだが

http://venturebeat.com/2012/01/24/why-walmart-is-using-node-js/
http://venturebeat.com/2011/08/16/linkedin-node/
http://reidburke.com/deck/2014/noderoad/
https://engineering.groupon.com/2013/misc/i-tier-dismantling-the-monoliths/
https://www.paypal-engineering.com/2013/11/22/node-js-at-paypal/
https://www.talentbuddy.co/blog/building-with-node-js-at-ebay/
https://www.talentbuddy.co/blog/building-with-node-js-at-netflix/
https://www.talentbuddy.co/blog/building-with-node-js-at-dow-jones/
https://www.talentbuddy.co/blog/building-with-node-js-at-the-new-york-times/