About Viktor Engborg

I’m a product designer from Sweden, based in Northern California. I’ve worked in web and mobile for 20 years, starting at digital agencies in Sweden, and I’ve spent most of my career on early product teams in consumer health.

I lead design for SuppCo, now part of Function Health. That includes TrustScore, SuppCo’s supplement quality score. I joined in September 2024, when SuppCo was a seed-stage startup. Function Health acquired SuppCo in May 2026.

Before that, I led design at Mindbloom, where I designed AI-assisted intention setting and voice journaling for at-home ketamine therapy, and intention quality rose 23%. At Levels, I redesigned how the app shows real-time glucose data, built the design system, and later became the company’s only designer.

I’ve been the first designer at three startups. At Zero, I joined as one of the first three hires, turned a countdown timer into a full subscription app, and designed fasting zones, which became the biggest driver of Pro upgrades. I later led Zero’s design team of five. At Topology, I designed custom glasses fitted by a phone face scan. At FitStar, an App Store Best of 2013 app, I was the founding designer; Fitbit acquired the company in 2015.

I build what I design, working with AI coding agents, and the language follows the product. Through my studio, Dark Thirty Labs, I designed, built, and released Movable, an iOS movement app for adults over 50. My wife and I also run House Of, three vacation homes in California, with a direct booking site I designed and built.