Hak Jin played volleyball professionally for 10 years before a knee injury forced him to quit the sport. In 2014, he landed a cameo role in the OCN crime drama Reset. He came to prominence after appearing in the KBS2 variety program Cool Kiz on the Block in 2016. Also in 2016, he was cast in a supporting role in the JTBC series Solomon’s Perjury, which was followed by an appearance in the hit KBS2 family drama Father Is Strange in 2017. In 2018, he played one of the cleaning fairies in the JTBC romantic comedy series Clean With Passion for Now.

Hak Jin attended Myongji University.