Does a reverse proxy make node.js safe?

I want to put node.js on the cloud for an application which has sensitive corporate information. I am afraid node.js is not as secure as some of the older servers since it has not been in the wild a lot. I saw people recommending to use a reverse proxy with it to make it safer. I understand how it is safer since it is not directly exposed to the world. But still, xss and other attacks are possible. From a security perspective only, anyone thinks that node.js is on par with the older servers? Any tips on "how to convince your boss + the corporate security team"?