If you wanted to go fast, I think going with what you already know is a good go. Plus consider the amount of time you can dedicate learning adding security features using the langguage you are already good at.
Security of the coding language depends a lot on the coding architecture and which codes are executed client-side vs on server. Purely saying one coding language is bad over the other is kinda incorrect. But then there's the compiler issue, but discussing that would be off topic since this is web development.
I think the best framework would be django and node.js - also it'd be important to remember that node js is not a language but a web dev framework.