[01] Platform Engineering / Consumer PWA
Ittsui France一対
An anti-calendar relationship ritual platform, engineered to protect real human
connection against schedule decay. One proposal a week, one tap to confirm, and
silence in between. The invited party needs no account and no install — the
invitation is a plain web link, which is also the product’s entire distribution
model. A single TypeScript codebase ships the web app, the installable PWA, and
native iOS and Android builds.
- Stack
- Next.js 14 · React 18 · TypeScript · Tailwind · Firebase / Firestore · Capacitor (iOS / Android) · Stripe · Vercel
- Engineering
- Passkey authentication (WebAuthn), push notifications, one-tap calendar export, scheduled server cron, graceful three-tier venue fallback
- Measured
- TTFB 38 ms · FCP 420 ms · load 409 ms
[02] Developer Infrastructure / Compliance Automation
Kuchimoto Play Telemetry
A managed closed-testing platform for Google Play’s mandatory 14-day production
access requirement — real human testers on real devices, not the synthetic bot
rings that risk account termination under Google’s own manual review. An
interactive live-cohort dashboard renders per-device session activity and a 14-day
telemetry curve against Google’s real tester floor, backed by a structured
CSV/JSON export of every session, ready to attach to a Production Access application.
- Stack
- Next.js 16 · React 19 · TypeScript · Tailwind v4 · Framer Motion · Vercel Edge
- Engineering
- Interactive cohort telemetry dashboard, capacity-based tester allocation model, CSV/JSON session export, Google-Groups-based closed-testing onboarding
- Measured
- TTFB 24 ms · FCP 412 ms · load 327 ms