About the author
Siarhei Tarasenka
Product Designer · 18+ years · IADAS member · Webby & Lovie judge
I've spent 18+ years making digital products people trust — bringing business goals, user needs, and technical constraints together into experiences that work. Veritheme is where my design and engineering sides meet.
Who I am
I'm a seasoned Product Designer with over 18 years of experience creating digital products — including my work as a Principal Designer at ChatOn (chaton.ai), a top-charting AI assistant app. My job is to shape the whole user experience — from research and user flows to prototypes and the final, polished UI — bringing business goals, user needs, and technical constraints together into intuitive, engaging mobile products.
I've also worked as a team lead and product manager for a utility-app development team. Thanks to a technical foundation and a background in web development, I bridge design and engineering — which matters enormously when the interface gets complex. Alongside client work, I mentor emerging designers and produce educational content on product design through my YouTube channel.
I'm drawn to projects where aesthetics, logic, and emotion converge — in my view, it's in that balance that significant digital experiences are born.
Why I do this well
End-to-end product design
Shaping the whole experience — from research and user flows to prototypes and polished UI. Balancing business goals, user needs, and technical constraints into products people actually enjoy using.
Design ↔ engineering bridge
A technical foundation and a background in web development. That means design decisions that survive implementation, and a real conversation with engineers when interfaces get complex.
Leadership & product thinking
Years leading design for top-charting consumer apps, plus stints as team lead and product manager. Comfortable owning the outcome, not just the mockup.
Mentorship & education
Mentoring emerging designers and producing educational content on product design — because a craft is worth more when it is shared.
Recognition
Membership and jury work in the field — a small proof that the craft holds up beyond my own projects.
IADAS Member
Member of the International Academy of Digital Arts & Sciences.
View profileWebby Awards
Judge — evaluating excellence in digital products and experiences.
Lovie Awards
Judge — recognizing the best of the European internet.
Why I built Veritheme
One theme.json instead of two truths
Across every project the same thing happens: the Figma file and the shipped product slowly drift apart. Veritheme is my fix — a single theme.json that Figma, the CSS, and AI agents all read from, so design and code stay honest.
Built by someone who ships both sides
Because I work as both designer and builder, Veritheme is opinionated where it should be: a fixed spacing grid, semantic color roles, real dark mode, and an MCP server so AI builds with your actual system — not a guess at it.
Find me
Connect, follow the build in public, or just reach out — I read everything.
Try the thing I keep talking about
66 free components, a Figma plugin, and an MCP server — all driven by one theme.json.