A Flutter app for tracking baby growth. MVC architecture with Provider for state, dio interceptors cleaning up the API layer, and a login → onboarding → home flow in progress.

A flight price comparison and last-minute deals service. Flask + MySQL on an Oracle Cloud Free Tier box (Rocky Linux), Blueprint-based MVC. Pulls fares from the Travelpayouts Data API with a 6-hour cache, monetized via Aviasales affiliate deeplinks.

A SaaS tool for collecting and analyzing Google Maps reviews. Playwright scrapes the reviews, the Claude API handles Korean-language sentiment analysis, keyword extraction, and drafts reply suggestions. Dashboard served with FastAPI + Streamlit.

A distributed crawler designed for scraping low-cost carrier sites. Adapter pattern lets per-airline crawlers be swapped in and out, with Go/Rust workers and a Redis queue handling distribution.

Maintaining the ezApproval e-approval system and a document/meeting-minutes search system. Built on raw ADO.NET (SqlConnection/SqlCommand) with stored procedures — preferred over EF Core for direct control.