I just got a job offer to be a FE Developer, but I've never heard of that term before. Strong HTML, CSS, Javascript, jQuery, XSL skills required.
I consider myself proficient in all of those fields except for XSL and I've never heard of that term before. Can anyone enlighten me?
Front-End Developer ... Looking at the requirements, they are expecting you to develop the GUI / Front-End of a website/web app for them.
XSL - Extensible Stylesheet Language. This is for transforming XML to other formats like HTML.
"Front End" means everything to do with the (web) user interface of a system, as opposed to the "Back End", which tends to mean the business processes, database access, and so on.