Frontend for Web3 protocols by day. Four live products of my own at Zeronics.
Planning, design, code, infra, payments, and marketing, all mine. Every link opens a live product.
Three apps, both stores. Concept, design, React Native, review responses, and release ops all mine. Every listing ships under the seller name zeronics.
A map and calendar of running events / v1.3
A WebView shell over the web app with a native bridge I wrote: push, Apple Health, in-app purchase, calendar, share, haptics, theme, and auth.
Android was rejected twice on health-data policy. I rewrote the Distance permission rationale and the medical disclaimer, and it passed.
English shadowing on YouTube / v1.0.3
The A-B repeat shadowing player runs on web and mobile, and recording with AI pronunciation scoring is ported into the app too.
expo-audio could not produce WAV on Android, which broke scoring. Pinning audio-studio 3.2.0 fixed it.
Day work matching in the Philippines / v1.1
Worker and employer live in one app: nearby gigs, applying, PIN completion, and mutual review all happen in-app.
By design the app never touches money, so there is no payment module. Completion is proven by exchanging a PIN on site instead.
From F&B SaaS to Web3 protocol frontends.
Dividend-backed stablecoin protocol
I build the web app for the apxUSD / apyUSD protocol. 197 commits into a Next.js 16 monorepo, owning everything from chain expansion to the deploy pipeline and monitoring.
Fragmetric - Solana restaking protocol
I built the web app for Fragmetric, a Solana restaking protocol. 240 commits made me the second-largest contributor, and the work reached into the Go backend and the DFDV site.
Jangbudaejang - F&B franchise management SaaS
I owned the frontend of a franchise management SaaS. I built the paid commercial-district and trend analytics products alone, and when backend capacity ran out I proposed and stood up a GraphQL server myself.
A one-person company where I plan, build, and sell
I registered the company in 2025 and run four products through it. Design, code, infra, payments, marketing, and support all pass through my hands. Business and e-commerce registration are done, and real payments are flowing.
About Zeronics →Strava runs drawn as a GitHub contribution grid. Four days to build, 900 users connected within three days.
Scored how dated a Korean given name feels using 2008-2025 registry data. The viral loop worked, organic traffic never came, and the cause was a passive go-to-market.
A Telegram mini app with a clicker game and 5-second SOL price prediction betting. Four days from idea to deploy.
Also raw material for the products. Runxel and Snapxel both started as things that annoyed me while running.
