Ruchika,I need to tell you that the market is very competitive right now. Many of our hi-tech companies here have been downsizing on account of the economy. Toronto is where most of the head offices for these companies are based. It might be tough to find something in E-Commerce for the time being. Hopefully things will pick up for the end of the year.
If I were you, I would try to develop a network of contacts. This means that you will need to do a lot of work researching companies and going to job fairs once you get here. Monster.ca, Jobbus.com, Canadiancareers.com and Jobboom.com are good sites that are totally dedicated to Canada. They have a lot of information on them that can help in developing contacts.
Best of luck
Harry