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Sangrak Choi began their work experience in 2011 at itsme as a Backend Software Engineer. Sangrak then moved on to 1km in 2012, where they worked as an iOS/Backend Software Engineer until 2014. In that same year, they co-founded OP.GG and took on the role of CTO. In 2019, they became the CEO and Founder of OP.GG, which they continue to be.

Sangrak Choi attended Keimyung University starting in 2009, and their field of study was Computer Science. No information is provided regarding the completion of a degree or any subsequent educational experiences.