Ha Yeong Park

Owned the Miricle landing and its core AI pages (Redesign, Shorts) — fast, SEO-safe surfaces on top of an evolving AI SDK.

• Launched the Miricle landing page in 3 weeks after joining a brand-new team — unified two product domains (AI Tools + AI Presentation) into a single hero
• Reached MAU 146,982 / 434K cumulative signups post-launch — resolved the "randomized content + SEO" conflict with SSR + ISR
• Shipped a Gmail-style zero-cost undo for AI Shorts — a useDeferredCommit hook defers the commit so cancelling never fires the API
• Optimized Core Web Vitals for the global launch

Stack: React · Next.js · TypeScript · TanStack Query · SEO

Product Engineer, Growth — localization and growth experiments for Miricanvas Japan. Operating principle: experiment fast, roll out sturdily.

• Grew signup conversion 21.6% → 26.3% (onboarding drop-off to ~1%) by splitting onboarding into its own domain.
• Drove a 4× lift in new-user template adoption through A/B-tested localization.
• Built lightweight experiment infrastructure — isolated experiments, CMS kill switches, and QA-facing devtools for fast iteration.
• Kept a single multi-language page maintainable via a localization abstraction layer, avoiding per-language branching.

Stack: React · TypeScript · Jotai · TanStack Query · i18n

Product Engineer, App Squad — building the Miricanvas mobile webview app and its native-facing behaviors.

• Worked across the webview ↔ native bridge, handling mobile-specific behavior: downloads, tablet sizing, and long-press.
• Built the Settings tab end to end — password recovery, account deletion, and more — including mobile-correct keyboard handling (KeyboardAvoidingView).
• Helped establish the app repo's design system.

Stack: React · React Native · TypeScript · Jotai · TanStack Query