Nah, code is code. I've done a good chunk up and down the stack. DB specs, angular, no SQL, sql, react, jQuery, c#, node, infra, k8s, pho, java, blah blah blah
Fact of the matter is if you really want to be marketable you have to learn everything thrown at you, and usually fast. I say my number one skill is being able to pick up new tech, and recognizing where I need to learn more.
Not trying to sound arrogant, there is a ton I don't know, but to be employable now as an engineer you pretty much have to say yes when they ask if you know something, or prove you can learn it.
I was rejected for one job because I hadn't learned python fully.
Oh yeah but I can pick it up, probably before starting. I've done C++, C#, NodeJS, Go, Ruby, what's another language haha
" Sorry we really need someone who can code in python"
:| k well bye, guess it's just impossible to fathom that I could learn yet another scripting backend language. 15 years into my career I'm pretty sure I can just go learn another language now. If you bothered to test my skills at all you'd see in qualified, but sure. I learned it anyway just to spite them.