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Backend Structure

The JJI backend is primarily server-side, handling data aggregation, filtering, authentication, and analytics computations.

API architecture

  • Route handlers: Next.js App Router route handlers in app/api/
  • API versioning: v1 API under app/api/v1/
  • Server utilities: Shared server logic in server/ directory
  • Authentication: Edge middleware in proxy.ts for auth checks

Key backend responsibilities

  • Dashboard data aggregation and filtering
  • Report generation and analytics computation
  • User-scoped data isolation (one user never sees another's data)
  • Trade import parsing and validation
  • Prop-firm phase evaluation and tracking
  • Background jobs via Vercel Cron (daily maintenance, phase evaluation, subscription checks)

Security

  • Row-Level Security (RLS) via Supabase for database-level user isolation
  • Server-side auth enforcement in all route handlers
  • Rate limiting on API endpoints
  • CSP headers configured in security.config.js