Full-stack developer crafting AI-powered products

Cloudflare · Vercel · Supabase · AWS

View Projects ↓ GitHub

— About

I build AI-powered web and mobile applications — from behavioral economics tools to multi-AI platforms. Currently developing 10 products across education, fintech, cloud infrastructure, and creative tooling.

Projects

Currently building 10 products across education, fintech, cloud infrastructure, and creative tooling.

  1. 01 / 10 In Development

    AI-powered learning support iPad app for Japanese students. Capture problems with OCR, get AI-generated explanations, track learning progress, and review mistake history.

    Stack
    Swift / SwiftUI / Supabase / OpenAI API / RevenueCat
    Features
    OCR problem capture · AI-powered explanations · Learning dashboard · Mistake history tracking · Parental consent system

    Private preview admin@studyai.jp

  2. 02 / 10 スグペナ！ In Development

    Behavioral economics-based smartphone addiction management app. Set screen time goals with financial penalties to build better digital habits.

    Stack
    Next.js 15 / React 19 / Cloudflare Workers / AWS DynamoDB / AWS Cognito / Stripe / LINE API
    Features
    Screen time goals with penalties · Stripe-powered penalty system · LINE integration · Fraud detection

    Visit Site ↗ admin@sugupena.com

  3. 03 / 10 In Development

    Multi-AI platform for cloud infrastructure, analytics, and AI-powered applications. Integrates multiple AI providers with billing and security.

    Stack
    Next.js 16 / Prisma / Vercel AI SDK / Anthropic / Google AI / OpenAI / Stripe / Supabase
    Features
    Multi-AI integration · Usage-based billing · WebAuthn authentication · Sandboxed code execution · i18n support

    Visit Site ↗ admin@idit.jp

  4. 04 / 10 In Development

    Adobe Creative Cloud cost optimization tool. Get personalized plan recommendations and manage licenses to reduce subscription costs.

    Stack
    Next.js 16 / Cloudflare Workers / Cloudflare D1 / Stripe / Resend
    Features
    Personalized plan recommendations · License key management · Automated reminder emails · Cost optimization dashboard

    Visit Site ↗ admin@ccslash.com

  5. 05 / 10 クリエイターペイ In Development

    A payments and tax support platform for creators. It intermediates creator payouts with Stripe Connect (Separate Charges and Transfers) and automatically generates tax documents as PDFs.

    Stack
    Next.js 15 / Supabase / Stripe Connect / Vercel / Resend / Tailwind CSS v4
    Features
    Stripe Connect payment intermediation · Automatic tax document generation (PDF) · Creator dashboard · Permission management with Supabase RLS

    Coming soon

  6. 06 / 10 いっしょロック In Development

    A focus support app that lets two people mutually block smartphone app usage. It detects leaving the session, notifies the partner, and supports continued focus with check-ins.

    Stack
    Expo (React Native) / Next.js / Supabase / Stripe
    Features
    Mutual blocking for pairs · Leave-session detection and notifications · Check-in functionality · Expo push notification integration

    Coming soon

  7. 07 / 10 迷惑電話対策コンソール In Development

    A nuisance-call prevention console for stores. It automatically classifies and anonymizes incoming calls and provides a management screen where store staff can see the situation at a glance.

    Stack
    Next.js 16 / Supabase / Twilio / Stripe
    Features
    Automatic incoming-call classification and filtering · Anonymized data display · Twilio Webhook integration · Payment status synchronization

    Coming soon

  8. 08 / 10 In Development

    A booking and payment platform for hourly and whole-facility rentals, such as private saunas. A multi-tenant service where each facility takes payments through Stripe Connect.

    Stack
    Next.js 15 / Prisma / PostgreSQL / Auth.js / Stripe Connect
    Features
    Hourly and whole-facility booking · Multi-tenant data isolation with row-level security · Payment links and POS QR codes · Authorization holds and no-show charges

    Coming soon

  9. 09 / 10 0秒決済 In Development

    A cashless payment platform for doujinshi conventions. Buyers finish paying while still waiting in line, saving time for both buyers and circles.

    Stack
    Next.js / TypeScript / Drizzle ORM / Neon / Stripe / Cloudflare R2
    Features
    Checkout by entering the amount agreed with the circle · Payment captured only after the in-person handoff · Payments to each circle's Stripe connected account

    Coming soon

  10. 10 / 10 In Development

    A digital content marketplace for creators. Its Dynamic Incentive Allocation Engine works back from each creator's desired minimum payout to set sale prices and promotions.

    Stack
    Next.js 15 / TypeScript / Prisma / PostgreSQL / Stripe
    Features
    Pricing from the creator's minimum payout · Price candidate evaluation · Token-protected file downloads · Coupon, point and affiliate logic

    Coming soon

Get in Touch

Interested in collaboration? Feel free to reach out.

admin@sugertiger77.com GitHub