Canada

You have asked a very interesting and pertinent question. Foreign companies do recruit students during placements season. However, for a person who is already working, this path is not available. There are really very slim chances for companies from abroad to recruit from India. But then countries like Canada have announced that they will allow immigration of almost 4 Lacs persons every year. You can attempt via this to immigrate and get a job there. Other European countries seek professionals in desired fields to immigrate. My sincere advice would be to approach either embassy of the countries where you want to go or some reputed agencies in the field of providing either immigration or jobs abroad. Best wishes to you.