Dojin is the CEO and Founder of Happy Moonday, a leader in women's healthcare that helps more women to live healthier lives. She believes that the menstrual cycle is a key signifier of overall health, leading her to found the company in 2017. Since then, she has led its growth from high-quality female health products to mobile and web services and health content. Today, she is responsible for setting the company's strategic direction.

Forbes recognized Dojin as one of the "30 Under 30 Asia" in 2021. Since 2023, she has sat on the board of Impact Alliance.

Dojin has BAs in Business and Anthropology from Seoul National University.