Front end / Back end

In France, we also use “front end” and “back end”, but we can also use “coté serveur” et “coté client” to translate it:

Le Javascript est généralement utilisé en Front end, et le PHP en Back end

Framework

As specified in this post, we commonly use “framework“, it is hard to translate, except with “structure logicielle”, but framework is definitely the most common one.

Zend est un framework connu en PHP

Server side

“Server side” is translated as “coté serveur”:

L’application est codée en PHP coté serveur