Kim's album, 'Magnificat' was recorded and released in 2014 and received rave reviews in classical music magazines, among them Gramophone and Choir & Organ. Gramophone calls his music 'haunting, beautifully arched, warmly compassionate'.
His second album, Infinity, released in January 2018, climbed to the No. 2 best-selling classical albums on iTunes, No. 6 on the Billboard Traditional Classical Albums Charts.
Among his most popular and globally performed works are 'Even When He is Silent', 'Cradle Hymn', and 'Flight Song'. In 2016 'Cradle Hymn' was performed at the White House for President Barack Obama. Kim has written several large-scale works for high-profile events and in 2017 his 'Requiem' was performed at Carnegie Hall.
In December 2020 and January 2021 Kim released 4 piano singles on Decca classics. Among them, 'Snow Light' debuted as No. 1 on Apple Music's New Classical Songs as well as No. 11 on general Classical Songs.