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Seongyeol Yi

Seongyeol Yi

I became a frontend developer to build services people love to use. I run a dev Instagram with 30K+ followers, learning how to communicate value effectively. I pursue verifiable code.

Experience

Kakao

Frontend Developer

2024.08 -
Wallet Partner Center

B2B admin platform for KakaoTalk Wallet service operators

  • Webpack → Vite migration (81% avg build time, 77% HMR reduction)
  • Analytics dashboard development (Recharts)
  • Multi-step form implementation (React Hook Form)
  • Legacy modernization (Yarn → pnpm, TS 5.7, Node 22, GitHub Actions)
KakaoTalk e-Document

In-app webview service for electronic document viewing/management

  • Native auth flow refactor (Visibility Event → Polling)
  • WebView–native auth state sync via bridge
  • Landing page SEO optimization
  • Legacy modernization (React 19, Zustand v5)

SkyonEdu

iOS & Frontend Developer

2021 - 2023
Minit Worker

Gig worker matching platform app

  • iOS/Android app development with React Native, App Store deployment
  • Group chat with TalkPlus SDK (read receipts, image sharing, FCM)

Projects

cse.snu.ac.kr

2023.07 -

Official website of SNU Computer Science & Engineering

  • Full rebuild of 90+ page types from Drupal → Next.js
  • Tag-based On-Demand ISR for per-content cache management
  • Web security hardening (CSP, HSTS, X-Frame-Options)
  • URL-based Korean/English i18n
  • React Router migration with Claude Code

Interactive tech blog (React 19, Astro 5, Tailwind CSS 4)

  • GitHub OAuth comments (Supabase, server-side cookie sessions)
  • Motion-based animations
  • MDX interactive content

Instagram sharing dev memes and knowledge

  • 31,116 followers (as of Feb 2026)

Interactive digital circuit editor (React Flow)

  • Digital circuit modeling with recursive jotai atoms
  • Propagation delay via jotai-effect

Talks

Momentum 2025

Youth IT conference speaker

2025.12

EBS FM Radio

Guest on youth radio program

2025.11

Education

Seoul National University

Environmental Materials Science, Double Major in Computer Science (GPA 3.74/4.3)

2018.03 - 2025.02

Hwaseong High School

2015.03 - 2018.02