“Staff Engineer” is about halfway up the technical career ladder in many places, with a few possible (but increasingly rare) levels above, and a few levels below. Someone promoted to staff engineer likely has at least 5 years of work experience (probably more) and is self-motivated, good at their job, gets along well with their coworkers, and has some technical vision.

Many of these people might have some quasi-managerial duties (interacting with other parts of the organization, helping with recruiting, ...), get roped into more meetings than they would like, or make high-level technical decisions and delegate work to a handful of more junior engineers, but most of them are sitting at their desks writing code a significant part of the day (or perhaps rewriting the schlocky code that the junior engineers just handed in).

I've worked for 2 well known software companies and what you are describing is a Senior Engineer in both (5-10 years experience).

The place I am now starts fresh grads as Engineer I, then Engineer II, Senior Engineer, Principal Engineer, Architect and then Staff Engineer. Each promotion takes about 4-5 years so you aren't reaching Staff until about 20 years. A Staff Engineer is basically fully autonomous and is an IC that reports directly to the executives. They work on what they want and with who they want.

I understand this is different at Google and I guess Staff is the equivalent to a Google Fellow.

My experience aligns with yours

Yeah, the version the earlier poster was talking about in his link is somewhere between your levels of Senior and Principal.

I think it depends on the company. I was extrapolating from my own experience but I realize it may not be the same elsewhere. In my experience Staff Engineers were almost always at least 10 years-experienced. I might be wrong about those companies I mentioned, though, because I've never worked at any of them

Also keep in mind I said "usually" in my original comment. Blue collar labor and software engineering are not directly analogous because yes, there are software developers at the high end that are making a lot of money compared to some of the best blue collar workers. But it's still only a small percentage of them making that much, and I wouldn't mention those figures to someone looking to go into software for that reason

"That's an even more specific case, because again, most software developers aren't working at Google/FB/Airbnb/Uber/Snap."

That's why you said:

"when it's usually 10-20+ year tenured engineering managers at a few specific companies"

right?

Yeah I was speaking in broad terms across the industry, not accounting for edge cases