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Space Navi (スペースナビ)

Google CASA Certified SaaS platform for rental space operators. Built as solo developer in ~1 year. Features automated Gmail integration, intelligent email parsing (HTML parsing + regex with AI fallback), AI analytics chat with Generative UI and Smart Context Management (RAG-lite), Stripe subscriptions, and 10-100x query optimization.

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Organization:Giant More Co., Ltd.
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Next.jsNext.jsTypeScriptTypeScriptFastifyFastifyPrisma ORMPrisma ORMMySQLMySQLGoogle CloudGoogle CloudGmail APIGmail APIGemini AIGemini AIStripeStripeAnt DesignAnt DesignDockerDocker
Screenshot of Space Navi (スペースナビ)

Space Navi (スペースナビ) - Rental Space Analytics

A Google CASA certified SaaS platform for rental space operators with automated email integration and intelligent data extraction. Built as solo developer in ~1 year.

Overview

Space Navi automates sales tracking by connecting to Gmail and extracting reservation data from booking platform emails. The platform provides real-time dashboards and analytics to help rental space operators understand their business performance.

Key Achievements

  • Google CASA Certified — Passed comprehensive security assessment for Gmail API sensitive scope
  • Solo Development — Built complete SaaS platform from scratch in ~1 year
  • Query Optimization — Achieved 10–100x database performance improvements
  • 99% Parsing Success — HTML email parsing with AI fallback
  • AI Analytics Chat — Conversational analytics with Generative UI and RAG-lite context

Key Features

  • Automated Email Integration — Connect Gmail accounts via OAuth and automatically extract booking data
  • Intelligent Parsing — HTML email parsing + regex with AI fallback for accurate data extraction
  • AI Analytics Chat — Conversational business intelligence powered by Gemini with function calling, Generative UI, and RAG-lite context
  • Multi-Platform Support — Works with 6 major Japanese rental space booking platforms: Instabase, SpaceMarket, Spacee, Yoyakul, Kashispace, Upnow
  • Analytics Dashboard — Interactive charts and statistics for revenue tracking
  • Stripe Subscriptions — Payment integration for SaaS billing
  • Bilingual Support — Full Japanese/English localization

Tech Stack

Frontend: Next.js 14, TypeScript, Ant Design 5, React Query v5, Tailwind CSS, React Hook Form, Zod

Backend: Fastify 5, TypeScript, Prisma ORM, Zod, Pino

Integrations: Stripe, Gmail API, Google Gemini AI, Google OAuth 2.0

Role

Solo Full-Stack Developer - End-to-end development including frontend dashboard, backend API, batch processing system, cloud infrastructure, and security compliance.