Gubanova/Sintsov started the 2015–16 JGP season by taking gold in Colorado Springs, Colorado, finishing 3.54 points ahead of silver medalists Joy Weinberg / Maximiliano Fernandez. They won bronze in Toruń, Poland, sharing the podium with Ekaterina Borisova / Dmitry Sopot (gold) and Amina Atakhanova / Ilia Spiridonov (silver). These results qualified them for the 2015–16 JGP Final in Barcelona, where they finished fourth. Gubanova/Sintsov finished 8th at the Russian Championships and fourth at the junior level. Named as alternates for the 2016 World Junior Championships, they were called up when an injury led Atakhanova/Spiridonov to withdraw. They placed 11th in both segments and 11th overall at the event in Debrecen, Hungary.