Solomin made his junior international debut in October 2013, placing 14th at the ISU Junior Grand Prix (JGP) event in Tallinn, Estonia, and went on to win the Swedish national junior title. He first competed on the senior international level in January 2014, at the European Championships in Budapest, Hungary, but was eliminated after placing 34th in the short program. He reached the final segment at the 2014 World Junior Championships in Sofia, Bulgaria, placing 23rd in the short program, 22nd in the free skate, and 22nd overall.