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.

GitHub Instagram

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

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

yeolyi.com

2024 -

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

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

@yeol.dev

2024 -

Instagram sharing dev memes and knowledge

31,116 followers (as of Feb 2026)

Logic Gate Simulator

2024

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