In 2004 Khairullin won the U-14 World Youth Championship in Heraklion, going on to win the U-18 section in Belfort, France in 2005.

That year, he finished second to Sergey Karjakin in the "Young Stars of the World" tournament held in Kirishi, Russia, narrowly missing a GM norm.

In 2012, he tied for 1st–8th with Vadim Zvjaginsev, Alexander Areshchenko, Valerij Popov, Boris Kharchenko, Evgeny Romanov, Maxim Matlakov and Ernesto Inarkiev in the Botvinnik Memorial in St.

[4] In 2013, he tied for 1st–11h with Pavel Eljanov, Dmitry Kokarev, Vadim Zvjaginsev, Alexander Areshchenko, Maxim Matlakov, Denis Khismatullin, Oleg Korneev, Dragan Solak, Sanan Sjugirov and Ivan Bukavshin in the Chigorin Memorial in St.

With the Saint Petersberg Chess Federation team, he won the European Club Cup 2011 in Rogaska Slatina, scoring 4.5/6.