Sounds like you're senior to me. If you can quantify how you're the "go-to" guy, then you're in a position to ask for a raise.

To explain my stance vaguely, if you can make critical decisions about abstract concepts, then I'd consider you senior. For instance, I recently saw that some of my coworkers were using an HTML tag in a way that was technically correct, but in a situation where a different tag is more suitable based on the context of the page. This is something I've learned through my studies and experiences as a front-end dev, and as such, contributes in a small way to my "senior-ness".