In February 2015, Goh became the youngest-ever national winner at the age of 15 after defeating Lim Yin Fun in the finals of the Kuala Lumpur Open. At the 2015 Southeast Asian Games, Goh won the bronze medal in women's singles event and a silver medal in women's team event. She won her first senior title, the Belgian International at the age of 15 by defeating Kirsty Gilmour in the finals. She won her second title at the Vietnam International. At the 2015 World Junior Championships, she won the girls singles' event by defeating compatriot Lee Ying Ying in the final.