In his first two years of high school, Yang worked at a book and DVD rental store as a part-time job.

[3][4][5] In January 2017, Yang played the roles of young Song Seung-heon and Lee Young-ae's assistant in SBS's historical drama Saimdang, Memoir of Colors.

[12] Following his acting roles, Yang experienced a rise in popularity and was labeled "monster rookie" by the press.

[13] Yang was included in the 2017 Forbes Korea 2030 Power Leaders List placing fourth for his outstanding performance starring in four dramas in the first year of his acting career.

[14] In 2018, Yang was cast in the romance comedy drama Still 17, playing the role of a stage designer who suffers a trauma at the age of seventeen.

[16] In 2019, Yang joined tvN reality show Coffee Friends, a project to raise awareness toward giving and aiding others, small amounts at a time.