Projects

Personal and community-focused projects, as commercial projects cannot be disclosed due to confidentiality agreements

Japanese Learning Platform

Nhai Kanji

A kanji learning tool that breaks each character down into radicals with visual diagrams and handwriting practice, covering JLPT N5 to N1, with Active Learning and Shadowing modes.

Ruby on Rails Next.js Flutter MySQL Redis Sidekiq Firebase OpenAI Gemini Claude Docker AWS Cloudflare
Korean Learning Platform

Nhai TOPIK

An online platform for TOPIK I, TOPIK II and EPS-TOPIK preparation — vocabulary, grammar and pronunciation lessons with flashcards powered by spaced repetition.

Ruby on Rails Next.js Flutter MySQL Redis Sidekiq Firebase OpenAI Gemini Claude Docker AWS Cloudflare
Chinese Learning Platform

Nhai HSK

A Chinese learning platform following the HSK 3.0 standard — level-based vocabulary, Hanzi stroke practice, real-video shadowing and HSK & HSKK mock tests covering all four skills.

Ruby on Rails Next.js Flutter MySQL Redis Sidekiq Firebase OpenAI Gemini Claude Docker AWS Cloudflare