About
I go by David or rj (short for rjsgml), a nickname born from typing my Korean name, Gun-Hee, on an English keyboard. In Korean, my name is a blueprint: Gun (건) to build or found and Hee (희) to shine brightly. I live by the motto Always Building, turning that name into a daily promise to create products that shine for those who need them most.
My journey bridges science and technology. I hold a HBSc in Bioinformatics from the University of Waterloo, where I co-authored a scientific publication on probiotic delivery, and I recently completed a Computer Systems Technology diploma at BCIT, focusing on full-stack development and systems design.
Outside of work, I enjoy exploring new technologies, building side projects, entertaining my cats, playing pickleball, or watching baseball - Go Jays!
Currently in Toronto, ON
Work Experience
Skills
Check out my latest work
I've worked on a variety of projects, from simple websites to complex web applications. Here are a few of my favorites. View all projects on my GitHub.
NexusScore
Track North American major leagues, college sports, global football, racket sports, combat sports, motorsports, and esports all at once
Vistra
OCR + translation to web pages, captured screenshots, clipboard images, and selected text
Versa
Translate song lyrics directly inside the Spotify Web Player without tab switching or copy-pasting
ReText
Replaces browser Cmd/Ctrl+F with a powerful find & replace panel - live search, regex, match navigation, redact, and more
GhostPlayer
Float any HTML5 video in a frameless always-on-top overlay. Hide Mode blacks out when cursor leaves
GeoDial
Look up US & Canadian area codes by city, ZIP, or county. Search available Twilio phone numbers instantly
FlowCV
AI-powered ATS scoring and resume tailoring for Overleaf LaTeX Resumes, powered by Claude
transcribr
An extension that captures audio from browser tabs and displays real-time transcriptions as a caption overlay, powered by Deepgram
Loopify
A screen recording extension that captures screen recordings directly in MP4 format with ability to convert them to animated GIFs.
Pulse Play
A video speed control extension that allows users to temporarily accelerate playback by holding a hotkey; compatible with YouTube, Netflix, and more.
Notion Library
A web clipping extension that automatically saves book details from Google Books directly into a Notion database. It captures metadata like title, author, and cover image using a book's ISBN, allowing users to customize fields to fit their existing library setup.
ClipSign
A Raycast extension that generates, stores, and instantly pastes electronic signatures. It allows users to create new signatures from custom text and fonts or upload an image of a handwritten signature, organizing them for quick clipboard access.
Dr. Po Fong Yang
Executed a full website migration and performed content edits for the official site of Dr. Po Fong Yang, a registered periodontist (gum specialist) in Toronto. This project involved transferring the website to a new host and updating key content
Stories A Million
A community writing platform that connects writers and readers, leveraging the OpenAI API for AI-assisted story creation. The platform provides tools for writers to generate unique plots, characters, and text with AI, while readers can discover and engage with these collaboratively crafted narratives.
MindThreads
A Chrome extension that captures and archives your ChatGPT sessions, transforming them into an interconnected knowledge base. Its core feature generates dynamic mind maps from your chats, visualizing the flow of ideas in a node-graph structure.
