I'm in a megafirm you've probably heard of, but I've been in this role for my third and fourth YoE, so I'm wondering how long it should take me to get to mid-level/senior.
On a serious note, I'm a junior (soon to be mid-level as of next year) full-stack dev, who wants to have a strong knowledge of JS to give myself as much of a chance as possible at promoting to senior ASAP.