Space Navi - Rental Space Analytics
Google CASA Certified SaaS platform for rental space operators. Built as solo developer in ~1 year. Features automated Gmail integration, intelligent email parsing with AI (100% success rate), Stripe subscriptions, and 10-100x query optimization.
Next.js
TypeScript
Fastify
Prisma ORM
MySQL
Google CloudGmail APIGemini AIStripe
Ant Design
Docker
Space Navi - 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.
Live URLs
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 54-question OWASP 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
- 100% Parsing Success - REGEX patterns with AI fallback using Gemini
Security & Compliance (CASA)
Passed comprehensive security assessment covering:
- Authentication & session management
- Access control & authorization (IDOR protection)
- Input validation & injection prevention (XSS, SSRF, SQL injection)
- Cryptography & data protection (AES-256-CBC)
- Secure CI/CD deployment
- GDPR compliance
Key Features
- Automated Email Integration - Connect Gmail accounts via OAuth and automatically extract booking data
- Intelligent Parsing - REGEX patterns with AI fallback for accurate data extraction
- Multi-Platform Support - Works with major Japanese rental space booking platforms (Instabase, SpaceMarket, Spacee, Yoyakul)
- 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 + Raw SQL, Zod validation, Pino logging
Infrastructure: GCP Cloud Run, Cloud SQL (MySQL 8), Secret Manager, Artifact Registry, GitHub Actions CI/CD, Docker
Integrations: Stripe, Gmail API, Google Gemini AI, Google OAuth 2.0
Architecture
- Domain-Driven Design with clean separation of concerns
- Type-safe API contracts with Zod schemas and OpenAPI generation
- AES-256-CBC encrypted OAuth token storage
- Multi-tenant architecture with company isolation
- Workload Identity Federation (keyless GCP auth)
- Zero-downtime deployments
Role
Solo Full-Stack Developer - End-to-end development including frontend dashboard, backend API, batch processing system, cloud infrastructure, and security compliance.