French electronic music producer Léo Naït Aïssa, known as Quelza, is currently based in Berlin, Germany. His work is defined by a precise, cinematic approach to techno that frequently incorporates IDM and breakbeat elements. Signature releases include the 2025 EP Pensa Poetico on Dekmantel UFO and the 2026 release Above The Clouds I Finally Found Peace on Ostgut Ton. He is a regular performer at institutions such as Berghain, Fabric, and Tresor, where he is recognized for sets that prioritize pacing and structural progression over conventional peak moments. His sound is characterized by detailed, layered rhythms and a deliberate, evolving intensity. Quelza stands out in the contemporary scene for his ability to maintain a distinct, shape shifting sonic identity while resisting the pressure to conform to established genre trends.