The management prides themselves on the company culture they created. They say that the company values feedback and sincere communication.
However, in practice people don't really give feedback to each other rather they do this behind their backs. This makes it hard to discuss issues and the feedback can be distorted as it travels upper in the hierarchy.
The motto is that if someone is let go it is never a surprise to them, but it has happened multiple times that they let go of people without prior warnings. They are not clear about their expectations and they do not help employees fit in to the company rather they expect them to figure it out themselves.
On a day to day basis the communication culture at the company is good, engineers treat each other with respect. However, there are a few important people who are exempt from this because they are irreplaceable. This leads to unnecessary conflicts and no amount of feedback given to them changes this.
On the management level the communication is insincere. They say that the company pays top in Hungary but that is simply not true (given that the requirements are stricter for sofware engineer levels, there are no benefits, etc.).
Also the company internally said that they do not care about glassdoor reviews. But it turns out that they secretly asked their most loyal employees to give feedback here. You can check it, a lot of perfect reviews were given in a few weeks window.