Event Ticket Booking Platform
A multi-tenant event ticketing SaaS platform where multiple organizers can create and manage events while selling tickets to their customers through an isolated and concurrency-safe booking system.
Problem
The platform needed to support multiple independent event organizers while ensuring tenant data isolation. At the same time, concurrent users could attempt to reserve the same seat, creating a risk of double booking and inconsistent ticket inventory.
Solution
I designed the platform around a multi-tenant architecture with tenant-aware authorization and implemented database row-level locking during seat reservation to prevent multiple users from successfully booking the same seat under concurrent requests.
Architecture
- Multi-tenant SaaS architecture
- Tenant-aware domain and data access
- Policy-based authorization
- Gate-based authorization
- Permission-driven access control
- Database row-level locking
- Transactional seat reservation workflow
- Event and ticket management modules
LaravelPHPMySQLBladeBootstrapDatabase Transactions
Challenges
- Ensuring strict isolation between different organizers
- Preventing double booking during concurrent seat reservations
- Designing authorization rules that consistently respected tenant boundaries
- Maintaining a scalable structure for multiple organizers and events
Lessons
- Multi-tenancy requires authorization and data isolation to be treated as first-class architectural concerns
- Application-level checks alone are not enough for concurrency-sensitive operations
- Database locking is essential when multiple requests can compete for the same resource
- Well-defined policies and permissions significantly reduce the risk of cross-tenant data access