Hwang began his professional football career in 2011 when he joined Seongnam FC, a South Korean club. He then moved to Gamba Osaka in Japan in 2015, where he established himself as a prolific goal scorer. Hwang’s impressive performances caught the attention of European clubs, and he signed with FC Girondins de Bordeaux in France in 2019. After a successful spell at Bordeaux, Hwang made a loan move to Nottingham Forest in 2021, where he has continued to showcase his goal-scoring abilities.