I was a systems engineer in Dublin and the only significant payraise I got was after I left the company for 4 months to then rejoin, my salary was bumped up 12k euros, for a total of 62k/yr, with 150 shares over 4 years (sorry I do not remember the vesting scheme).
The HR department in AMZN has the tendency to screw internal employees upon promotion. The way it was unofficially explained to me by a low-level buddy in HR is that there are salary ranges for each corporate level, and during a promotion you get just over the lower bound of the salary range for your new corp level, that's the policy, that's what happens.
New hires instead have negotiation margin and, while the hiring manager can't offer a salary higher than the approved salary range, more often than not the offer will end up in the upper bound of the range, to lure the candidate in.
Furthermore, there are huge differences between salary ranges in job roles, a Systems Engineer will always be paid 15 to 30% less than a Software Development Engineer at the same level, despite the fact that the skills and duties are not that much different, why? Again unofficially "because Amazon values more people that write software". Except the fact that in my ex-team, we all wrote software and the expectations were all the same regardless the job title (there was however a difference between levels).
So yeah, as internal promotion you have absolutely NO leverage regarding salary, if you want a salary increase and your organization is hungry for people but is having trouble in hiring (like it happens frequently in Dublin where the job market is quite competitive), I'd suggest you start looking around for a new job, accept the offer and then come back to your same team 4 months later. If you leave the company for less than 6 months and your position hasn't been filled in the meantime, the hiring manager is able to extend an offer without sending you through an interview loop, you'll get your old job back but with a nice pile of money on top.