Daniel Rosenfeld (born 9 May 1989), better known by his stage/online name C418 (pronounced "see four eighteen"), is a German musician, producer and sound engineer, best known as the composer and sound designer for the sandbox video game Minecraft. He has also written and produced the theme for Beyond Stranger Things and the soundtrack for the Steam release of Cookie Clicker. He has also DJed for American rock band Anamanaguchi.

Source: Wikipedia (https://en.wikipedia.org/wiki/C418)