First, let me apologize for my English. It's not my native tongue.
I stumbled upon this article publish in this Israeli newspaper: http://www.haaretz.com/mobile/were-jews-ever-really-slaves-in-egypt-or-is-passover-a-myth-1.420844
I tried to do some research but did not found something convincing.
So.... Is it true that there's no living proof that the Jews were enslaved in Egypt around the Exodus period?
EDIT: grammar
Here's two good threads on the subject of whether the Jews were enslaved in Egypt and whether the exodus story could be true.
http://www.reddit.com/r/AskHistorians/comments/1grzha/the_reality_is_that_there_is_no_evidence/
http://www.reddit.com/r/AskHistorians/comments/19p1vu/do_we_know_if_the_exodus_happened_the_way_its/
In summary there's a distinct lack of non-theological evidence supporting the story and a great deal of evidence that the story isn't true.
We also have plenty of evidence that the Pyramids were built by an Egyptian workforce and not by slaves
http://www.reddit.com/r/AskHistorians/comments/134u0i/what_evidence_is_there_of_ancient_egyptian/
This question comes up fairly often (though usually about the pyramids), you may find answers over here.