negotiation is very much a thing even at FAANG. If anything, it can help you being at the top of your assigned band. Other things can be negotiated.
Source: I am no great negotiator, but I've always negotiated my salary and got 10-15 % more than what I would have had w/o asking anything. This compounds after a few stints. And I've been a manager in startup/mid size/big tech: always negotiate.
There is also the signing bonus, which is usually available for a recruiter to sweeten things if the first offer is marginal. Google-recruiters for years claimed it was non-negotiable, all the while negotiating it for people who were willing to play the game.
Source: I am no great negotiator, but I've always negotiated my salary and got 10-15 % more than what I would have had w/o asking anything. This compounds after a few stints. And I've been a manager in startup/mid size/big tech: always negotiate.