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Tech-Stack

3 min read

Technology Stack - Reffi App

Purpose

Simplified overview of technologies used, tailored for business stakeholders.

Core Technologies

Frontend (What Users See)

  • React - Modern web framework used by Facebook, Netflix, Airbnb

    • Why: Fast, reliable, huge developer community
    • Cost Impact: Abundant talent pool, easier to hire developers

  • TypeScript - Enhanced JavaScript with type safety

    • Why: Reduces bugs by 40-60%, easier to maintain
    • Cost Impact: Lower maintenance costs long-term

  • Tailwind CSS - Modern styling framework

    • Why: Faster design iterations, consistent UI
    • Cost Impact: Speeds up UI development by 30-50%

Backend (Behind the Scenes)

  • Supabase - All-in-one backend platform
    • Database (PostgreSQL)
    • User authentication
    • File storage
    • Server functions (Edge Functions)
    • Cost: $25-75/month (scales with usage)

Payment Processing

  • Stripe Connect - Industry-standard payment platform
    • Why: Trusted by millions of businesses (Lyft, Shopify, Amazon)
    • Features: Escrow payments, automatic payouts, dispute handling
    • Cost: 2.9% + $0.30 per transaction
    • Compliance: Handles all PCI compliance requirements

Location Services

  • Google Maps API - Map and location search
    • Why: Most accurate, familiar to users
    • Cost: ~$200/month at scale (free tier initially)

Development & Quality Tools

Code Quality

  • SonarQube - Automated code review and security scanning
    • Ensures enterprise-grade code quality
    • Catches security vulnerabilities before deployment

Version Control

  • Git - Industry standard for code versioning
  • GitHub - Code hosting and collaboration

Testing

  • React Query - Data fetching and caching
    • Improves app performance
    • Reduces server costs

Infrastructure & Hosting

Current Setup

  • Frontend Hosting: Vercel/Netlify → Moving to Render

    • Cost: $0-20/month initially
    • Automatic deployments
    • Global CDN (fast worldwide)

  • Backend Hosting: Supabase Cloud

    • Cost: $25-75/month
    • Managed PostgreSQL database
    • Automatic backups
    • 99.9% uptime SLA

Future Considerations

  • Self-Hosting Option: Available if needed (would increase to ~$200-500/month)
  • Scaling Path: Current architecture supports 100,000+ users without changes

Security Stack

Enterprise-Grade Security

  • Authentication: Supabase Auth (OAuth 2.0, JWT tokens)
  • Database Security: Row Level Security (RLS) policies
  • Payment Security: PCI-compliant via Stripe
  • API Security: Rate limiting, input validation
  • Audit Logging: All sensitive operations tracked

Monitoring & Support

  • Error Tracking: (To be configured - Sentry recommended)

    • Cost: $26/month
    • Real-time error alerts

  • Analytics: (To be configured - Google Analytics or Mixpanel)

    • Cost: Free tier initially

Total Technology Costs

Monthly Operating Costs

ServiceInitialAt 1K UsersAt 10K Users
Supabase$25$50$75
Hosting$0-20$20$50
Email (Resend)$10$20$50
Maps API$0$50$200
Error Tracking$26$26$26
Total$61-81~$166~$401

Note: Stripe fees (2.9% + $0.30) are transaction-based and covered by platform fees

One-Time Costs

  • Domain Name: $12-15/year
  • SSL Certificate: Free (included with hosting)
  • Initial Setup: $0 (already built)

Technical Advantages

Speed to Market

  • Chosen stack: 6-8 weeks to build
  • Custom backend: Would take 4-6 months
  • Savings: ~$50,000 in development costs

Maintenance

  • Managed services: Reduce DevOps overhead by 80%
  • Auto-updates: Security patches applied automatically
  • Backup/Recovery: Automatic daily backups

Scalability

  • Current capacity: 10,000 concurrent users
  • Scaling path: Add $100-200/month per 10K users
  • No redesign needed: Architecture supports 100K+ users

Developer Experience

Onboarding Time

  • New developer: 2-3 days to be productive
  • Code deployment: 5 minutes (automated)
  • Rollback capability: 30 seconds if issues arise

Technology Longevity

  • React: Industry standard, not going away
  • TypeScript: Microsoft-backed, growing adoption
  • Supabase: Open source, can self-host if needed
  • Stripe: Market leader, extremely stable

Detailed Technical Stack

Complete technology documentation: /home/alexd/Projects/reffi-webapp/.opencode/rules/memory-bank/tech.md

Bottom Line for Business

✅ Modern, proven technology stack ✅ Cost-effective for startup phase ✅ Scales efficiently with growth ✅ Easy to hire developers ✅ Enterprise-grade security ✅ Low maintenance overhead

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