Jou Nielsen is a DJ and producer focused on deep, melodic, and emotional club music. His SoundCloud bio frames it as a mission and highlights 10+ years of experience in the underground scene, alongside his producer work. 
Across his public mixes and live sets, the sound sits in the deep / melodic / progressive house lane: long-form flow, clean groove, and gradual build-ups. You can hear it clearly in sets for platforms and events like Reflect @Garage442 and Ser Tribu x Departure Label Festival.
He’s also listed on Beatport, where the artist profile describes the same direction and ongoing releases/appearances.