taisei.dev

Taisei Miyazaki

Software Developer with 6+ years building full-stack web apps (React/Next.js, Node.js/Java) and mobile apps (Flutter). Currently CTO of an AI-native SaaS, owning architecture through deployment. Former maintainer of Yamada UI (1k+ stars), a React UI library.

Experience

UNIQUE ENTERTAINMENT Inc.

2025/8 - Present

CTO

Leading an AI-native SaaS as CTO, owning architecture through deployment. Built an AI-driven development workflow around Claude Code (a custom agent harness with a verification loop) that lets a single developer design and ship a 97-table, 100+ screen SaaS. Delivered AI features end-to-end with OpenAI (GPT-4o) and Google Vision, including a parallel batch OCR pipeline that processes up to 100 handwritten answer sheets per job (10 concurrent) using Structured Outputs and Supabase Realtime.

Sorich Inc.

2022/8 - 2025/7

FullStack Developer

Architected a Flutter accounting app using DDD and Onion Architecture to model complex Japanese tax and accounting rules. Led and mentored a 4-person team, promoting one junior developer to a lead role, and built a full-stack React app with OAuth 2.0/PKCE authentication and WCAG 2.1 AA accessibility compliance.

KMK WORLD Inc.

2020/4 - 2022/7

FullStack Developer

Improved a slow SQL query (originally over a minute) to sub-minute performance by analyzing and tuning its execution plan, for a medical salon management system built with Java and Spring Boot.

Education

Cornerstone International Community College of Canada (CICCC)

2026

Web Development Diploma

Vancouver, BC

Chuo University

2020

Bachelor's Degree of Economics

Japan

Skills

React.js iconReact.js
Next.js iconNext.js
TypeScript iconTypeScript
JavaScript iconJavaScript
Flutter iconFlutter
Dart iconDart
Node.js iconNode.js
Express.js iconExpress.js
PHP iconPHP
Laravel iconLaravel
Java iconJava
Spring Boot iconSpring Boot
Python iconPython
Flask iconFlask
PostgreSQL iconPostgreSQL
Firebase iconFirebase
Supabase iconSupabase
Docker iconDocker
Vercel iconVercel
Sentry iconSentry

Projects

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📦 Package

A Flutter package that provides customizable icon-based checkboxes with smooth animations and flexible styling options.

FlutterDartPackageUI
View project
custom_vimeo_player

custom_vimeo_player

📦 Package

A Flutter package for embedding and controlling Vimeo videos with custom controls and advanced playback features.

FlutterDartPackageVideo
View project
Yamada UI

Yamada UI

⭐ OSS

Open-source React UI component library (1k+ GitHub stars). Contributed as a former core maintainer, focusing on accessibility and internationalization.

ReactTypeScriptOSSa11y
View project

Latest Articles

Let's Connect

I'm open to full-time roles, collaborations, and OSS projects.

Based in Vancouver, Canada 🇨🇦