Siarhei Tarasenka — BlogSiarhei Tarasenka (Sergei Tarasenko) — product designer, manager, and team lead with 18+ years of experience. Ex-principal designer of a top-charting AI assistant (100M+ downloads) and creator of the Veritheme design system. IADAS member and Webby & Lovie Awards judge.https://tarasenka.me/Naming design tokens: eight heuristics for where the three-tier model stops helpinghttps://tarasenka.me/blog/design-token-heuristics/https://tarasenka.me/blog/design-token-heuristics/On making spacing and radius as semantically clear as color and type — and the rules that take over when the textbook goes quiet.Sun, 19 Jul 2026 14:00:00 GMTDesign TokensDesign SystemsNamingOne theme.json: a single source of truth for design, code, and AIhttps://tarasenka.me/blog/one-theme-json/https://tarasenka.me/blog/one-theme-json/Your design language lives in three places that never agree — Figma, CSS, and now AI. A machine-readable theme.json turns them into one source every surface reads.Sun, 19 Jul 2026 13:00:00 GMTDesign TokensDesign SystemsAIVerithemeClarity is conversion: why removing cognitive load is the cheapest growth leverhttps://tarasenka.me/blog/clarity-is-conversion/https://tarasenka.me/blog/clarity-is-conversion/Every app competes for the same scarce attention. The friction you design out is the conversion you don't have to buy — a case for clean, low-effort interfaces.Sun, 19 Jul 2026 12:00:00 GMTProduct DesignUXCognitive LoadConversionDesigners aren't artists: the job is the metric, not the beautyhttps://tarasenka.me/blog/design-is-not-art/https://tarasenka.me/blog/design-is-not-art/Design is a business function judged by conversions and outcomes, not by how it looks. A case for treating beauty as a tool — welcome when it moves the number, optional when it doesn't.Sun, 19 Jul 2026 11:00:00 GMTProduct DesignDesign StrategyMetricsConversionDesign has a bill: why every feature has to earn its cost backhttps://tarasenka.me/blog/design-has-a-bill/https://tarasenka.me/blog/design-has-a-bill/A feature costs designer, developer, and QA time — real money. Before you spend a week perfecting it, ask how long it takes to pay that back, and whether shipping rough first would get you there faster.Sun, 19 Jul 2026 10:00:00 GMTProduct DesignDesign StrategyROIShippingCross-platform design systems: share the tokens, split the componentshttps://tarasenka.me/blog/cross-platform-share-tokens/https://tarasenka.me/blog/cross-platform-share-tokens/One file trying to run iOS, Android, and web at once buckles. What's actually shared is narrow — colours and icons — while the components diverge. Design around that, not against it.Sun, 19 Jul 2026 09:00:00 GMTDesign SystemsCross-platformDesign TokensMobile