Promotion, increment etc depends on the OT hours contributed. OT is "mandatory" here. You don't have to do anything during OT. Just act busy. If you do less OT than other colleagues for that month, will be invited to drink coffee with the manager because of the "poor" performance.
Say goodbye to worklife balance once you enter here. Expected to work even on the public holidays.
Timeline given to complete work is short due to multiple handover stages.
Management do not communicate well with engineers. There's no teamwork or even a small sense of camaraderie.