Led backend development of a Learning Management System using Java and Spring Boot, designing RESTful APIs, role-based access control, and course management modules for a platform used by approximately 500 users.

Instructed high school students from Eastern Thailand in data structures and algorithms. Designed competitive programming problems and comprehensive test cases for contestant selection.

Chat backend implemented in Go, following a modular monolith architecture with support for RESTful using Echo framework, gRPC, WebSocket APIs, and RabbitMQ-based messaging.

A video call web application where users sign in, create custom hand gestures, and on a peer-to-peer video call, posing created hand gestures will displays the label for both people. Hand poses are detected with MediaPipe Hand Landmarker from each caller's camera feed.

A simple expense-tracking web application with a summary dashboard. Built with Next.js for the frontend and a Go backend using Fiber v2 and GORM.

A Go-based user service built with Clean Architecture, featuring Google OAuth2 authentication, PostgreSQL persistence, and secure JWT access and refresh tokens with rotation, exposed via RESTful APIs using Gorilla Mux.

Algorithms for competitive programming and solutions to some problems.