In January 2014, Romanian top-flight club Astra Giurgiu transferred Alibec for an undisclosed fee, with the player penning a four-and-a-half-year contract.
He established himself as one of the division's best players, ending the 2015–16 campaign with 33 matches and 20 goals all competitions comprised as Astra Giurgiu claimed its first-ever championship title.

On 18 August 2016, Alibec netted the equalizer in a 1–1 draw with West Ham United in the first leg of the UEFA Europa League play-off round.
He then went on to make five appearances and score two goals in the group stage of that competition.
His notable display throughout 2016 won him a Romanian Footballer of the Year award.
In January 2014, Romanian top-flight club Astra Giurgiu transferred Alibec for an undisclosed fee, with the player penning a four-and-a-half-year contract. He established himself as one of the division's best players, ending the 2015–16 campaign with 33 matches and 20 goals all competitions comprised as Astra Giurgiu claimed its first-ever championship title.
On 18 August 2016, Alibec netted the equalizer in a 1–1 draw with West Ham United in the first leg of the UEFA Europa League play-off round. He then went on to make five appearances and score two goals in the group stage of that competition. His notable display throughout 2016 won him a Romanian Footballer of the Year award.
Denis Alibec