How to Become a Senior Developer

Submitted this mostly because I'm interested in other's thoughts on it.

Right now I'm about 5 years into my career, but I feel like I've stalled out and am currently trying to figure out the most efficient way to advance myself. I don't have a CS background (EE undergrad degree), so the algorithm stuff is what gets me the most, so I've started trying to read up on that stuff more, I'm just struggling to find sources with the right depth. Half of what I find all seems really obvious from what I've just happened upon and the other half goes way over my head before I've even started.

The one thing that I've found to be the perfect depth for me was this one really awesome blog post from a rust contributor that I can't find at the moment that was describing some sorted tree structure for strings and the like. (Apparently my memory is another problem.)

I just picked up 'The Imposter's Handbook', hopefully this can find the right balance.