The 29-year-old was a pending unrestricted free agent and will earn $425,000 in the American Hockey League if he plays there this season.
He was acquired by Ottawa from the Boston Bruins in January in a trade for forward Paul Carey.
In five NHL games with the Senators, Goloubef has two penalty minutes and three shots on goal.
The Mississauga, Ont., native had 24 points and 73 penalty minutes during 46 games in the AHL last season with both Providence, Boston’s affiliate, and the Belleville Senators, Ottawa’s farm club.
Goloubef earned a bronze medal with Team Canada at the 2018 Olympic Games in Pyeongchang and also won world junior gold in 2009.