Hello, I'm Kent Tsoi

Japanese Learning App

A full-stack Web Application built to help learners master Japanese vocabulary and Kanji. Solved the common limitation of traditional tools by accurately generating character-level furigana alignment instead of word-level overlays.

• Engineered an advanced Furigana generation algorithm by cross-referencing multiple Japanese NLP parser libraries with a Kanji database, enabling precise character-level phonetic alignment.

• Integrated a comprehensive multi-tier search system supporting dictionary lookups across Kana, Vocabulary, and individual Kanji characters.

• Built RESTful API services with Python Flask and containerized the backend environment using Docker for consistent local testing and deployment.

• Designed a responsive and intuitive user interface in React and TypeScript to handle dynamic text annotation and rich dictionary modals smoothly.

Enterprise Content Management System Revamp and Modernization (Current Company)

A comprehensive enterprise CMS revamp migrating legacy PowerBuilder desktop applications to a scalable web platform for course enrollment and academic score management.

• Engineered core enrollment workflows and automated score calculation engines using PHP CodeIgniter and MySQL.

• Modernized legacy PowerBuilder logic into modular REST APIs and responsive React components (MUI), significantly reducing code duplication.

• Optimized database query performance and data fetch strategies for handling large-volume student record processing.

• Containerized local development environments with Docker to streamline team deployment and environment consistency.

Healthcare Network Appointment & Booking Portal

A client-facing medical portal developed for a healthcare group, empowering patients to seamlessly search for network doctors and book clinical appointments.

• Engineered the patient appointment workflow and doctor selection module using React, TypeScript, and Mantine UI.

• Implemented centralized state management with Redux to persist authenticated staff credentials and real-time doctor selection states.

• Collaborated within an Agile team environment, managing Git feature branching workflows and resolving cross-developer merge conflicts.

• Adapted to rapid client feedback by rapidly triaging, debugging, and resolving edge-case issues under tight deliverable deadlines.

English Vocabulary & Lexical Vault

A high-performance personal vocabulary vault built through AI-assisted Vibe Coding, designed to organize, search, and analyze complex English word families and contextual usage.

• Leveraged modern LLM AI workflow (Vibe Coding) to rapidly architect and ship a full-stack vocabulary tool in record time.

• Engineered a developer-tool style UI with virtualized table scrolling (Mantine React Table) to ensure high-performance rendering of large datasets.

• Integrated Supabase (PostgreSQL) for real-time cloud data synchronization and relational lexical schema management.

• Designed multi-attribute filtering and dynamic search engines to query vocabulary across word families and grammar classifications.