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Web Services

Live products built end to end — from concept and design to implementation and launch

Shopify AppD2C / ECSaaSNext.js
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LIVE

All of these are live, in-production services

Each of these is a web service I built end to end — from ideation and design through implementation and launch — and that is still running today. Open any card to visit the live site.

Sync Master のトップページ
Shopify App
Live
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Sync Master

sync.hit-an.com

Shopify inventory, synced from Google Sheets.

Overview

An inventory sync app that connects Shopify with Google Sheets to bulk-update stock and metafields straight from a spreadsheet — no CSV exports, no copy-paste — and keeps everything current on a schedule.

Key features
  • Selective sync: paste SKUs/barcodes to update only chosen items
  • Whole-sheet sync to a location in one run
  • Map columns to auto-normalize and update metafields
  • Scheduled automation: daily, monthly, or custom
  • Test connection previews column mapping before running
  • Multi-location sync across warehouses
Tech stack
Next.jsTypeScriptTailwind CSSShopify AppVercel
sync.hit-an.com
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SUMI 墨 のトップページ
D2C Brand / E-commerce
Live
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SUMI 墨

kanji-calligraphy.com

Wear the 墨. One stroke, one life.

Overview

A D2C brand turning single-stroke digital calligraphy — drawn in a Tokyo studio — into print-on-demand heavyweight tees, delivering 3,000 years of kanji history as numbered limited editions.

Key features
  • Single-stroke, no-correction digital shodō design
  • Inventory-free print-on-demand production
  • Numbered limited editions for scarcity
  • Editorial essays on shodō principles and kanji etymology
  • Premium 240gsm cotton with water-based pigment ink
  • Automated backend: AI generation → QA → Printify → Shopify
Tech stack
Next.jsReact 19Shopify Storefront APIPrintifyOpenAIVercel
kanji-calligraphy.com
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stockfront のトップページ
SaaS / Web Production
Live
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stockfront

stockfront.app

Build it free. Decide once you see it.

Overview

A multi-tenant SaaS for small businesses and shops: build an LP-style brand site for free at the proposal stage, decide after seeing the finished form. Common modules — products, staff, blog, business days, Instagram — are assembled into a uniquely designed site per tenant.

Key features
  • Per-item product management with specs and pricing
  • 17 business modules: cases, staff, blog, business days, and more
  • Self-service updates of text, images, and hours from an admin UI
  • Automatic Instagram sync via the Meta Graph API
  • Secure tenant isolation with Postgres RLS and custom domains
  • Two plans: one-time purchase or monthly subscription
Tech stack
Next.js 15React 19Neon PostgresDrizzle ORMClerkVercel
stockfront.app
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Development & Inquiries

How we build

Problem Discovery
Business challenge deep-dive
Structure Design
Proposal from existing LP designs
UI & Visual Tuning
Design refinement
Implementation
Responsive coding

Tools & Tech

Claude Code
Next.js
Tailwind
Vercel
HubSpot
Responsive DesignForm OptimizationAnimationPerformanceAccessibilitySEO Ready