Paypal uses node.js extensively. https://www.paypal-engineering.com/2013/11/22/node-js-at-paypal/ https://www.paypal-engineering.com/2013/11/22/node-js-at-pay..

Paypal uses node.js extensively. https://www.paypal-engineering.com/2013/11/22/node-js-at-paypal/ https://www.paypal-engineering.com/2013/11/22/node-js-at-pay.... They even open sourced their implementation of it: http://krakenjs.com/ http://krakenjs.com/