They will engage you in more than one project, so you will be working 8-5 here in US company and in the evening handling some offshore project, so you will need to work after 6-7 at night to 10-11. So make sure that you expect to be full time at just one location and not handling other projects for them in offshore , but i am pretty sure they will eventually make you work long hours, not like US employer. They will try to get every pennies worth out of you. That is why , i did not join TCS.