An interface is not done when it renders. It is done when it survives production. For 4+ years I have been building e-commerce platforms, funnel engines and mobile apps — and shipping them working.
Five things worth showing
01
A funnel engine.
Zero dependencies.
A headless TypeScript SDK — slide navigation, conditional branching, scoring, seeded A/B assignment — with typed React bindings and a drag-and-drop visual editor of ~40 block types plus a standalone runtime. Designed and built end-to-end at Outbid.
02
An app that listens.
Lovyse, an AI-companion mobile app: chat-first architecture over three backend chat APIs, keyboard-synced virtualized chat, voice input with Whisper transcription, push notifications, i18n. Sole developer — live on the App Store and Google Play.
03
Checkout as a
state machine.
A production marketplace storefront on Next.js 15 / React 19 over a Medusa.js backend: multi-step checkout driven by XState, payment-strategy manager, map-based pickup delivery, Redis-backed ISR caching. Top contributor in a cross-functional team.
04
An API layer you
don’t rewrite.
qore — my open-source TypeScript API layer for React: a ky client factory with composable middleware, typed error normalization and declarative TanStack Query cache strategies. Used in production in commercial projects.
05
Research first,
pixels second.
design-intelligence-agent — a research-first design workflow for Claude Code: an orchestrator skill and a researcher subagent study official guidelines and real shipped products before any design decision, then label each decision with its evidence. Validated in CI.
: ~40 Block types, 2 E-com platforms, 3 Open-source repos, 4+ Years in production.
TypeScript.
React 19, Next.js, React Native / Expo, Zustand, XState, TanStack Query & Table, Tailwind CSS, Node.js. Feature-Sliced Design as a habit, not a slogan.
UTC+2.
Ukraine. Remote-first. English — B1, Ukrainian — native.