A few apps, templates, and playbooks I built or maintain.
NestJS • Next.js • React • PostgreSQL • Docker • Python ML
Complete platform rebuild with recipe weight calculations, nested cost structures, and intelligent ingredient matching. Rescued from 4-year development failure to working system.
NestJS • React • AngularJS • PostgreSQL • AWS • Kubernetes
Comprehensive vacation rental management platform with Stripe/PayPal payments, Booking.com/AirBNB integrations, and Spanish guest registration systems.
NodeJS • NextJS • TypeScript • AWS • PHP Laravel
High-performance reservation system serving 1000+ merchants, handling 15,000 requests/minute during peak events with Google Maps Booking API integration.
NodeJS • VueJS • WebRTC • WebSocket • MongoDB • AWS
MVP built from scratch in 3 months with real-time chat, video conferencing, learning analytics, and cross-platform mobile apps (iOS/Android).
Java • NodeJS • RabbitMQ • SQL Server • Microservices
Scalable distributed crawler serving 9+ billion requests over 6 months with 99.99% availability. Flexible parsing system supporting 500+ content sources.
Java • PHP • VueJS • Moodle • MySQL • MongoDB
Led development of educational platforms for Korean market. Helped achieve Moodle Silver Partner certification through delivery excellence and technical innovation.
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