Designing a refined and modern interface for sustainable innovation
2025
Product Design
At YouSir, I worked with a small design team to create a completely new digital experience for DeWarmte, a Dutch startup focused on smart and sustainable home heating. Our goal was to design an app that looked as innovative as the product itself. I focused on shaping a clean and confident visual direction that reflected the brand’s modern energy. We introduced a dark-themed interface with high contrast, clear typography, and intuitive data visualization. Every screen was carefully designed to make technical information easy to understand and pleasant to use. Alongside this, I helped build a solid design system to keep the UI consistent and scalable across mobile and desktop platforms.
The result is a premium, future-ready interface that matches the quality of DeWarmte’s physical products. The new design improved readability, strengthened brand recognition, and delivered a seamless experience across iOS, Android, and web. By combining clear interaction patterns with a bold visual identity, we helped DeWarmte stand out as a modern leader in sustainable heating.









