Architecture showcase for a private event commerce platform.
Focus areas:
- Ticketing workflows
- Offline-first sync systems
- Reconciliation logic
- Distributed state handling
- Operational tooling
Add staging or live URL here.
Platform supporting:
- Event discovery
- Ticket purchases
- Ticket wallet and QR tickets
- Organizer reporting
- Offline venue check-in
- Sync replay and reconciliation
How can venue check-in continue working when connectivity fails, without corrupting ticket validity or introducing inconsistent state?
This led to an offline-first replay architecture.
Customer App ↓ Ticketing Platform ↓ QR Validation / Check-In App ↓ Offline Queue ↓ Sync Replay Engine ↓ Reconciliation Layer
Discover Event ↓ Purchase Ticket ↓ Ticket Confirmation ↓ QR Ticket Issued ↓ Venue Check-In ↓ Offline Queue (if needed) ↓ Replay / Validation ↓ Final Reconciliation
Check-in events move through states:
PENDING_SYNC → SYNCED → DUPLICATE → INVALID → CONFLICT → FAILED
- Offline-first operation
- Replay queue processing
- Duplicate scan handling
- Conflict detection
- Eventual consistency
- Operational reconciliation
Backend
- Node.js
- TypeScript
- PostgreSQL
- Prisma
- Docker
Frontend
- React
- Next.js
Operational Concepts
- Offline queue
- Replay engine
- Reconciliation workflows
Capability → Approach
Offline Sync → Queued Replay Validation → Conflict-Aware Ticket State → Server Reconciliation Operations → Organizer Reporting
Allows venue operations to continue without connectivity.
Supports resilient sync after reconnect.
Separates sync from authoritative ticket state validation.
Potential evolution:
- Distributed replay workers
- More advanced idempotency controls
- Analytics instrumentation
- Multi-venue operational scaling
Add:
- Event discovery
- Checkout flow
- Ticket wallet
- Check-in app
- Reconciliation dashboard
This repository intentionally contains architecture documentation and showcase material only.
Core implementation remains private.