There are some links to different companies on the Industry Canada website.
For information specific to your field, including some information related to salaries and cities where there are positions available, you use the Job Bank website. This website used to be called the Working in Canada tool/website. It is very useful because you can search by “ASIC FPGA” to find listings and positions available in Canada.
Unfortunately, there is no guarantee that you will find employment in your field upon arrival in Ontario.