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. I also use AI tooling to speed up UI work, cutting implementation 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 Developer·MassAdoption
Jul 2025 – Apr 2026
Built and maintained a large-scale B2C web application used by 200K+ monthly active users
Frontend Developer·mypaperwork
Aug 2022 – Apr 2024
Developed a responsive webpage.
Frontend Developer·MassAdoption
Aug 2022 – Apr 2024
Built and maintained a B2B SaaS service, successfully migrating legacy features to a new environment.
Full Stack Developer·OasisBusiness
Feb 2021 – Aug 2022
Developed and managed both frontend and backend systems for small business owners.
Full Stack Developer·HanteoGlobal
Jun 2019 – Dec 2020
Created and supported frontend and backend functionality for a global K-pop fan community.

§ 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