UI / UX & Frontend, AI-native

I'm Stefan Kummerlöw, a Berlin-based UI/UX designer and frontend developer with over 16 years of experience building digital products and web applications across the DACH region and beyond. I work end-to-end: design, frontend development, and workflow automation, for founders and product leads who need one person to own the whole thing without agency overhead or designer-to-developer handoff friction. I understand the brief, question it when needed, and ship.

Before establishing my independent practice in 2023, I spent five years at Native Instruments in Berlin. First as a Senior Graphic Designer in marketing, leading design for 12+ global product launches annually, then as a Senior UI Designer in Products, designing complex interface architectures, design systems, and controls. Today, I build production-ready frontends (React, Next.js, HTML/CSS), integrating AI models and automation directly into research, prototyping, and implementation.

Based in Berlin. Working with clients across DACH and worldwide.