The code is a spaghetti-mess legacy. Qualified people leave this place 6-12 months since they get here (I hope you understand why by the end of the text), and you can literally see that in the projects' quality.
The salary is low. If you think "well, but I'll be relocated to Prague, it's worth it" you better think twice. If you still think it's a good idea - you definitely need more time to think.
The management is paranoid and infantile. If you think you had a bad boss before - you just haven't met these people yet, and I really hope you never will. There is strong nepotism in the company, and several people at high positions have COMPLETELY no clue what is going on around and have no competence. They say that high quality is required and then they say "it should have been done already, why is it taking you so long to do it? You are not professional or what". But all of that fades in comparison with the following.
They may threaten people. If you dare to have an argument with them or honestly say that you consider quitting and starting to work for the competitor... you're really better not to.
There was a day when one person told something that the management didn't like. The next minute all the food (fruits, snacks) was removed from all the floors - so everyone knows who is the power here, yeah!
There was a day when due to high staff turnover the management decided in the late evening time to break into computers of employees of the whole department and searched in their personal logged in emails and chats only God knows what.
There were people, who were fired due to "not being loyal", which means that "we fire you because we find out that you have friends, who work on our competitor"
There are also much more, for example - cameras in the office, you MUST spend 8 hours a day on your place (we are still talking about developers), you are not allowed to work from home, there is a whole department who write frontend (meaning PHP views) for the project without access to the project itself (and there is no API as well of course) - you just write tons of var_dumps, push it, build it, observe the result, write some code, repeat... you might as well stuck in this department, it does not somehow depend on you, etc...
And yeah, there are also different official names for this company, some of them are "HomoDevelopus" (you can find more reviews here too), "Casexe", "Develop Us"