Philosophy of Code

Software is not just logic; it's a medium for expressing care. I build tools that aim for the quiet intersection of utility and beauty. Minimalist architecture, intentional interactions, and an unwavering respect for the user's time and attention.

Drop your CV here

Hyoseo_Lee_CV.pdf

waterlooworks · co-op postings

Software Developer Intern

Some Co.

scoring

9 apply

Data Analyst — Coop

Other Inc.

scoring

6 Maybe

Marketing Assistant

Brand Co.

scoring

3 Skip

Most Recent

WW Extension

Archived (2026)

Chrome MV3FastAPISupabaseReactStripeGemini API

An AI job scorer for WaterlooWorks, UWaterloo's co-op board. Gemini rated each posting 1–20 against your profile and the scores landed as badges in the job table, so you could triage hundreds without opening one. Passed Chrome Web Store review, ran in production for two months, scored 1,749 real postings — then wound down with the co-op term it was built for.

Source Walkthrough 2026.05 - 2026.07

The Build Log —

2026

Macro-dashboard

2026.04 - 2026.05

React FastAPI PostgreSQL yfinance Gemini AI Docker

A highly customizable finance dashboard that helps users build the habit of 'looking around' — showing asset prices and news on a single screen.

Drop teaching materials

vocab.txt

grammar.md

generated

quiz.pdf

dialogue.md

flashcards.csv

English material provider for Korean language Project (EMPKL)

2026.03 - 2026.03

fastapi gemini api vite tailwind css postgresql

A web application that provides English learning materials for Korean speakers. Utilizes Gemini API for content generation and features a modern frontend built with React and Tailwind CSS.

hyoseo.dev/ hyoseo.dev/projects hyoseo.dev/blog

Hyoseo Lee

building things, writing about them

latest: ww-extension

Projects

ww-extension 2026.05

macro-dashboard 2026.04

EMPKL 2026.03

Blog

2026.05 · TIL

Astro v6 scoped CSS gotchas

2026.04 · dev-log

Refactoring the projects page

2026.03 · brain dump

On side projects

Personal Website and Blog Renewal

2026.03 - 2026.03

Astro TypeScript Tailwind CSS cloudflare pages

Redesigned and rebuilt my personal website and Blog with a modern look and improved performance.

2024

term

Recursion

definition

A function that calls itself

term

Big-O

definition

Notation for algorithm complexity

term

DFS

definition

Depth-first traversal of a tree

Dchup (Study Card Webapp)

2024.03 - 2024.07

React Python-fastapi AWS

Built a full-stack flashcard architecture aimed at providing a Quizlet-like experience. A deep dive into backend systems and data persistence.

cost function

training

predicted · alberta

n = 22,000

CxC Hackathon: Wildfire Analysis

2024.02 - 2024.03

Python Pandas Matplotlib AI

Analyzed 22,000 wildfire records in Alberta. Built an AI model to predict wildfire sizes and understand their impact on indigenous civilizations. Won the MEF Award.

Solitaire (React)

2023.10 - 2024.01

React

A complete reconstruction of the SHENZHEN I/O solitaire card game in React. The project where I truly mastered React's state management.

2023

Orbt!

2022.02 - 2023.05

HTML CSS JavaScript

A minimalist mini-game built as a Chrome Extension. Focused on smooth animations and simple, addictive mechanics.

solving RUR'U'FR'F'R

Rubik's Cube Helper

2022.07 - 2023.05

Python Pygame

IB Computer Science IA project. A solver that visualizes the solution process for a Rubik's cube with a custom UI.

z³ − 1 = 0

$Newton fractal for z³ - 1$

Newton Fractal Generator

high school - 2023.05

C++

IB Extended Essay project. Researched complex numbers and Newton's method to generate precise fractal images at specific resolutions.

F = G m₁m₂ / r²

Gravitational Motion Simulator

high school - 2023.05

C++ SFML

A physics simulator based on the laws of gravitation. Calculates field strength and executes based on classical mechanics.

Infection Simulation

high school - 2023.05

Python Pygame

MYP Personal Project. A simulator that visualizes disease spread based on simple contact rules.