Hyunyi Kim

§ 01About

Full-stack engineer with 6 years of experience building web apps at scale, including a K-pop platform with 5M users and a B2C startup that grew 10x in a year.

I own features end to end, from backend APIs to user-facing UI, and thrive in fast-moving startup environments where I'm close to product and users. I also use AI tooling to speed up UI implementation, cutting time from days to about an hour.

Outside work, I love being in nature. I often go jogging and lie on the grass, watching the trees and sky, which gives me the energy to work on my computer. I’m also a huge Korean food lover.

§ 02Experience

Working Experience

Résumé

Frontend Engineer·MassAdoption
Jul 2025 – Apr 2026
Built and maintained a B2C web application used by 200K+ monthly active users
Frontend Engineer·mypaperwork
Aug 2022 – Apr 2024
Built a responsive, interactive webpage.
Frontend Engineer·MassAdoption
Aug 2022 – Apr 2024
Built and maintained a B2B SaaS service, successfully migrating legacy features to a new environment.
Full Stack Engineer·OasisBusiness
Feb 2021 – Aug 2022
Developed and managed both frontend and backend systems for small business owners.
Full Stack Engineer·HanteoGlobal
Jun 2019 – Dec 2020
Built and maintained a K-pop big data platform serving 5M+ users worldwide.

§ 03Side Projects

Side Projects

Berlin Transit Alert
Telegram Bot
A Telegram bot that provides real-time public transportation alerts for Berlin.
NestJSSupabaseAWSTelegram Bot API
Local Voice AI
Desktop App
A local, privacy-first voice AI dictation app for macOS (Apple Silicon).
PythonQwen3-ASR-1.7B ModelMLX
Hangul Daily
Web App
A web app for people who have just started learning Korean. Since the Korean alphabet, Hangul, works very differently from the Roman alphabet, the app focuses on building that intuition from day one.
Claude CodeReactVercel
File Name Linter
VSCode Ext
Helps you follow consistent file naming rules for images, audio, fonts, and more.

§ 04Moments

What I like