What’s L5 and L6? What’s TC?

At Amazon you have the following levels

L4 - Junior. A new grad. Expected to be promoted within 2 years or let go

L5 - Mid engineer. Very wide band. Encapsulates anything between a level 2 engineer and a team lead at other companies. Can be expected to lead individual teams at times. Is considered a “terminal” position (there’s no expectation of a promotion past here)

L6 - Senior. Has the scope of what a Staff engineer would at other companies where you’re not only concerned with your team but others in the department. I think like 10% of engineers ever hit L6

L7 - Principal Engineer. You have like 1-2 of these per department. These are more like architects at other companies. About 1-2% of engineers ever hit this band.

L8 and beyond are for fancy hires and shit. Very few if anyone ever works their way up to those bands.