I build reliable web products by designing verification into delivery — from test strategy and automation to accessible interfaces, CI quality gates, and Cloudflare-based architecture.

Kanazawa, Japan · Portfolio

Core focus: TypeScript · Astro / React · Playwright · Vitest · Cloudflare

Local-first 365-day English-learning PWA built for structured practice when connectivity is unreliable.

• Engineering: React, TypeScript, IndexedDB, PWA, optional Cloudflare Worker + D1 sync
• Quality: strict JSON contracts, unit and browser tests, offline verification, and multi-job CI
• Evidence: architecture · offline & sync design · test strategy · CI

TypeScript CLI for turning SEO requirements into actionable CI feedback before deployment.

• Engineering: configurable rules, CLI reporting, and Fast / browser-backed analysis modes
• Quality: configuration-to-engine integration coverage, severity-aware exit codes, and GitHub Actions CI
• Evidence: implementation · tests · CI

Production-minded Astro reference site for a small service business, with deliberate safeguards for demo content and forms.

• Engineering: Astro, TypeScript, Tailwind CSS, optional microCMS, static deployment
• Quality: input validation and sanitization, Playwright E2E / accessibility / link / responsive checks, visual regression, and Lighthouse checks
• Evidence: test suite · Actions · design decisions

Volleyball scorekeeping and analysis app that combines quick match input with deeper, shareable analysis.

• Engineering: Astro SSR, React, Hono, Cloudflare D1, Drizzle ORM, and local persisted match state
• Quality: unit and Playwright E2E tests; strategy-board behavior is documented alongside the implementation
• Evidence: tests · design docs · recent pull requests

Quality engineering

• Test design, defect management, and risk-based verification in Scrum development
• Regression prevention with Playwright, Vitest, and CI quality gates
• Testable contracts and reproducible checks for AI-assisted and conventional development

Web engineering

• Accessible, maintainable frontends with Astro, React, TypeScript, and Tailwind CSS
• Cloudflare Pages / Workers / D1 architecture where it fits the product
• Careful handling of demo content, form behavior, SEO, and release readiness

• Trellune test strategy and security notes
• SEO Guardian CI workflow and rule tests
• Astro Music School E2E, accessibility, responsive, and visual checks
• V-Log architecture and strategy-board documentation

WebサービスのQAエンジニアとして約2年半、テスト設計・不具合管理・スクラム開発・自動化に取り組んできました。現在は、QAの視点を実装と検証の両方へつなげるWeb開発に注力しています。

JSTQB Foundation Level · 基本情報技術者試験 · Python 3 エンジニア認定基礎試験 · Python 3 エンジニア認定実践試験 · Webクリエイター能力認定試験 エキスパート · PHP8技術者認定初級試験

Core: TypeScript · Astro · React · Playwright · Vitest · Cloudflare

Supporting: Hono · D1 · Drizzle ORM · Tailwind CSS · Python · PHP · microCMS