During the 2002–03 JPG season, Dobrin was awarded gold at both of his assignments – Chemnitz, Germany and Milan, Italy – and silver at the JGP Final in The Hague, Netherlands. He won silver at the Russian Junior Championships and gold at the 2003 European Youth Olympic Festival in Bled, Slovenia. He finished 5th at the 2003 World Junior Championships in Ostrava, Czech Republic, after ranking fourth in his qualifying group, second in the short, and sixth in the free.