I was promoted to senior software engineer three times in my early career. They just tossed out the title as a freebee more-or-less, and the hiring companies told me I was too young/inexperienced for it.

There seems to be an understanding that happens, which means they ignore it.

They may, but the amount of information they're getting is low.

As a hiring manager I'll look at progression of titles *within a company*. This shows a track record of upward mobility. But if they go from "senior" in one company to "principal" in another, I find it meaningless.

This is definitely not true. It’s all dependent on the company size.

I work in cloud consulting (specialize in app dev).

I worked at AWS ProServe (full blue badge RSU earning employee) before working for a much smaller company. I’ve seen the leveling guidelines for both.

An L5 (mid level) at AWS had to be a subject matter expert in at least one area (development, DevOps, security, etc) and be able to lead a “workstream” of a larger project including dealing with a customer or a smaller project by themselves. That maps to a “Senior Architect” at my current company.

A senior (L6) at AWS should be able to handle larger projects with multiple workstreams and deal with more ambiguity. That maps to a staff at my current company (current position)

An L7 is usually over a practice and/or handling multiple large implementations and more involved with strategy. Imagine someone (who hypothetically - they don’t need outside consultants) was working with Netflix.

That maps to a “Senior Staff” at our company.

You might ask what about lower levels in consulting? I never work with them. The bilingual cloud architects/senior cloud architects work with them. We don’t hire anything lower than that in the US.

I'm guessing you've only worked at very large companies, specifically tech companies then?

I've worked at pretty much every size company imaginable.As the top post pointed out, these titles are meaningless across smaller companies. I've been at startups where nobody had titles at all, I've small companies where anyone remotely senior as a principal. I've also worked at large non-tech companies with only 3 levels for IC, after that you were expected to transition to management.

Large, tech companies have some degree they can be compared but what these titles mean from company to company is pretty meaningless.

They're somewhat standardized in Big Tech in that people have worked out how to map titles across these companies. But that accounts for a very small fraction of the total industry.