The lowest wages a startup can possibly offer, unless you're German, then you have the privilege of higher pay. There is also literally no plan for career paths. Your starting position will most likely be your only position (unless they radically restructure the office without warning and let you invent your own title).
The management is appalling. They are neither interested, nor in any way invested, in their staff. They will sooner see you walk out the door than actually implement a change you suggest. Zero respect for pretty much any lower-level employee as far as I could tell, with most of them considered merely to be "filling chairs". There is a complete lack of vision, leading to a change in tact one month, with little followup, and another change of direction a month or two later.
The atmosphere is toxic, rampant with cronyism, closed-door discussions and suspicion. Psychological bullying It's a very unpleasant environment to spend every weekday of your life.
You will have to fight like a dog for months to get a pay rise, and, even if you do fight, you might instead be offered an extra day or two of holiday each year.
As another reviewer mentioned, the almost comically unattainable bonuses were abolished without warning and with no replacement. You will not feel in any way rewarded by the company for any work you do.