Hi, I have site and it has done all seo work. but my all keywords are ranking well all SERP. but Still I didn't get any backlinks.. Site is 2 years old.. Has anyone faced this type of problem ever?
If you mean that typing in the link: command in Google doesn't show any links I wouldn't worry too much. If you are happy with your SERPs things are OK. I do have sites 2 or 3 years old that don't show any backlinks using link: but they are still on page 1 for some good keywords. For other of my sites, the reported number of backlinks goes up or down by 90% over time.
What do you mean by 'Still I didn't get any backlinks ?'. Backlinks are links from other sites to yours. There are many SEO techniques for getting backlinks. They dont just appear because you do well in SERPs. In fact its the other way round, getting many backlinks helps get a better position in SERPs.
First you have to show us your site name, only then we can give you a perfect answer for your backlinks. Also do not stop bookmarking your site, as well as adding new pages to your site, every week.