How should I present my under-review works in my CV and profile? I'm searching for postdoc positions in CS and sending my CV to here and there trying for different opportunities. However, I do not know how to present my under-review works. For instance, should I add them in my CV as under-review papers and mention the conferences to which I submitted? 
Then, should I also include the pre-prints in my postdoc applications? 

Also, these conferences have double-blind review processes. Hence, I'm not sure whether to include these works in my home-page or not. I like to add them to my CV and profile as they are extracted from the last part of my Ph.D.

Besides, would they (postdoc employers) take these works seriously knowing that they have not been published yet?
As somebody who hires post-docs regularly, the common thing to do is indicate them on your CV as submitted. Giving a current title is good. Where is not as important.

For your on-line profile, I don't look at those - that is what the CV you submitted is for. 

Look, I've been there as a graduating PhD with fewer publications than I would like. I will ask you about how your to-be-published stuff is coming, particularly since the interview isn't going to be the moment you submit your application. I will also ask your advisor how things are wrapping up, including the submitted articles.
Further, I realize that not all articles end up in the place they were first submitted. 

Don't lie about what is actually submitted. Be prepared to discuss how things are going on the articles. Be prepared to talk about them. Realize there are probably a few more coming in the future (field dependent, I know).