Born in Ploieşti, Doroftei began boxing, at the age of 14, at the Prahova Ploieşti boxing club. From 1986 to 1988, he won every Romanian national junior title. He went on to win five national senior titles in 1992, 1993, 1994, 1996, and 1997. He won bronze medals at the 1992 Summer Olympics in Barcelona and the 1996 Summer Olympics in Atlanta, Georgia. In addition, he was declared World Champion in 1995 and European Champion in 1996 and 1997. His record as an amateur was 239 victories and 15 defeats.
1992 (as a Light Welterweight)
1996 (as a Lightweight)
In 1997, Doroftei became a professional boxer, signing with the Canadian club Interbox. On January 5, 2002 he won the WBA world lightweight title, winning in a split decision over Argentinian boxer Raul Horacio Balbi 112-115, 114-113, 115-112. On May 31, the two fought again in Bucharest; this second fight was a unanimous decision for Doroftei, 118-111, 117-112 and 118-110.
On October 24, 2003, Doroftei was to fight a match against Panamanian boxer Miguel Callist. Doroftei had already announced that this would be his last professional match regardless of the result. As it turned out, the match was cancelled after Doroftei exceeded the maximum weight for lightweights at the weigh-in: he was 4¼ lb (1.9 kg) over the 135 lb (61.2 kg) weight limit, so he lost his WBA title.
His record consisted of 22 wins, 1 loss and one draw, with 8 knockout wins.
He now resides in Romania with his wife and two sons and is working as a trainer for boxing prospects. Sports publications have reported that he might return to Montreal as a trainer for Interbox.