The 18-year-old has made just a handful of appearances in the Romanian leagues, but Nantes were tipped off about his talents.
It is believed Nantes paid in the region of é¼200,000 for the Romanian youngster, who is tipped for big things in his home country.
He has signed a three-year contract with Nantes, where he will join the famed youth academy at Stade Le Beaujoire.