Holldën was born in Portugal. He began collecting records at 13 and DJing at 18, quickly becoming a regular fixture of the underground rave scene in the Algarve (PT), in the early 00's. After a long hiatus, he returned to the scene as a DJ and producer, putting together a series of local techno parties. It was at this point that he adopted his current alias. He founded his own imprint, Kuiper Noise, and went on to host "The Outpost" on Radio Solar FM, a techno show he conceptualized himself. His music has been released on such labels as Second State, Illegal Alien, Quartz, Out-er and many others. Such flurry of activity brought him to the attention of Disturb •, one of Portugal's most notorious techno organizations. ø[Phase], SNTS, Adriana Lopez, Boston 168, 999999999 or Antigone are only a few of the names he has shared the stage with. His "Parable EP" was voted by A Cabine as one of Portugal's best electronic records of 2019. A few weeks later, his debut on Rhod Records would reach #4 on Junodownload's techno chart. More recently, his Second State debut went straight to #1 on that very same store. His recent track 'Sourpuss' was released on world famous Suara.