You will be required to work more than what you are paid for (beyond the job description).
This is a private company with an entrepreneurial attitude. It means they can and will eliminate you when it's convenient for them. They will take care of themselves first and you need to ensure that you provide value to them or you will be removed. They will NOT invest in their employees. There's a lot of politics here (as with every company) but this one is so glaringly blatant. If you come from a decent, cultured, refined, structured and excellently managed company, this is NOT the place for you. Work place is like a jungle where you cannot trust anyone, including your group mates or co-workers. Make the most for yourself and learn as much as you can. It is a mistake to think you have a future here. Employee turnover is very high and demoralizing. As they are using you, use them as you search for another job. Even recruiters didn't want to deal with me due to the stained reputation of the company.
The best time working here is when you're alone to focus on your work --- so expect frequent and regular overtimes. It requires tremendous amounts of willpower & optimism to persevere in this hostile environment --- it will bring out the best in you (or worst depending on how you approach adversity).