Koen Heldens, a renowned mix engineer from the Netherlands now based in Los Angeles, has made significant strides in the music industry. He earned a GRAMMY nomination for his work on the "Spider-Man: Into The Spider-Verse" soundtrack and won American Music Award and Billboard Music Awards for his contributions to XXXTENTACION's debut album "17". Notably, he mixed XXXTENTACION’s hit single "SAD!" from the album "?", which became a No. 1 diamond-certified track and set a Guinness World Record for the "Most Streamed Track On Spotify in 24 Hours."

Heldens has also collaborated with major artists like Trippie Redd, Kanye West, Swae Lee, Lil Wayne, and Maluma. His work has contributed to record sales exceeding 80 million and over 26 billion on-demand audio streams.