The Project
For the SEBI Hackathon, I built a complete trading platform backend using Hono.js and Cloudflare Workers. The platform includes full authentication, KYC compliance, and real-time trading capabilities. The entire backend runs on Cloudflare's edge network, providing global low-latency access while maintaining security and compliance with SEBI regulations.
Architecture
The system uses a serverless architecture:
- Cloudflare Workers for API endpoints
- Cloudflare D1 for database (SQLite at the edge)
- Hono.js framework for routing and middleware
- JWT for authentication and authorization
- Cloudflare Queues for async processing
Key Features
The platform implements comprehensive trading functionality:
- JWT-based authentication system with refresh tokens
- KYC verification with PAN validation and document upload
- Real-time balance tracking with transaction history
- Buy/sell stock functionality with order management
- Portfolio management with P&L calculations
- Transaction audit trail for compliance
- Fraud detection and risk management
Security Implementation
Security was a top priority:
- Password hashing with bcrypt
- JWT tokens with short expiration times
- Rate limiting to prevent abuse
- Input validation on all endpoints
- SQL injection prevention with parameterized queries
- CORS configuration for API security
KYC Compliance
The KYC system ensures regulatory compliance:
- PAN card validation with government APIs
- Document verification workflow
- Identity verification checks
- Compliance status tracking
- Audit logs for all KYC operations
Trading System
The trading engine handles:
- Order placement and execution
- Real-time price updates
- Portfolio valuation
- P&L calculations
- Order book management
- Trade settlement
Performance
The serverless architecture provides:
- Sub-50ms API response times globally
- Automatic scaling for traffic spikes
- 99.9% uptime with Cloudflare's infrastructure
- Cost-effective operation with pay-per-use pricing
Lessons Learned
Building a financial platform taught me:
- Security must be built in from the start, not added later
- Compliance requirements shape the entire architecture
- Serverless can handle complex financial workflows
- Edge computing reduces latency for global users
- Audit trails are essential for financial systems