The culture is very toxic and fear-driven. An employee might be fired without any meaningful explanations the next day after discussing plans for the next few months with his/her manager.
Due to high stress at work, from time to time I have sleep disturbances. The most severe one lasted a whole week and eventually resulted in me calling an ambulance.
Everyone's obsessed with KPIs, not the real quality of deliverables. Projects are often badly scoped. As an engineer, you're just a "resource" that might be deployed to any project at any time without even asking you.
Working long hours is encouraged by the company's culture, although not compulsory. If you're perfect at everything (speed, quality, etc), you'll reach only the "Intermediate" level at a performance review. To get a higher score, you'll need to seriously sacrifice your life/work balance.