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Event ticketing & check-in platformEventLoop — Event ticketing & check-in platform Blueprint
EventLoop is a comprehensive platform empowering event organizers to create, promote, sell tickets for, and efficiently manage check-ins for events of any size.
The opportunity
Event organizers struggle with fragmented tools for ticketing, promotion, and on-site check-in, leading to operational inefficiencies, poor attendee experiences, and a lack of unified data. Attendees often face cumbersome purchasing processes and slow entry lines.
Who it's for
Small to Medium Event Organizer
An intuitive, all-in-one platform to quickly set up events, manage ticket sales, and streamline attendee check-in without high upfront costs or technical expertise.
Large Festival/Venue Manager
A scalable, robust system capable of handling high-volume ticket sales, complex access control, real-time attendee data, and integrations with existing operational tools.
Event Attendee
An easy, secure way to discover and purchase tickets, receive timely event information, manage their tickets (e.g., transfers), and experience quick, hassle-free entry.
On-site Check-in Staff
A fast, reliable mobile application for scanning tickets, resolving issues, and viewing attendee information, even in environments with intermittent internet connectivity.
Key features
Event Creation & Management
Organizers can create detailed event listings, define multiple ticket types (e.g., VIP, early bird), set pricing tiers, manage inventory, and design seating charts.
Secure Ticket Sales & Payment Processing
Integrated payment gateway supporting major credit cards and digital wallets, ensuring secure transactions and automated refund processing for attendees.
Customizable Event Pages
Branded event microsites with customizable layouts, embedded media, and essential event information to attract attendees and enhance their experience.
QR/Barcode Ticket Generation & Delivery
Automated generation of unique, scannable QR/barcode tickets delivered instantly via email and accessible through a mobile wallet or dedicated app.
Real-time Check-in App
Robust mobile application for event staff to scan tickets quickly, validate entry, manage guest lists, and support offline mode for connectivity issues.
Attendee Management & Communication
Organizers can view attendee lists, issue refunds, facilitate ticket transfers, and send targeted email/SMS communications before, during, and after events.
Sales & Attendance Analytics Dashboard
Comprehensive dashboards providing real-time insights into ticket sales, attendee demographics, check-in rates, and revenue performance for informed decision-making.
Access Control & Validation Logic
Configurable rules for ticket validity, re-entry permissions, and multi-day passes, ensuring only authorized attendees gain access to specific event areas.
Business model
EventLoop will primarily monetize through a per-ticket transaction fee (e.g., 2.5% + $0.99 per ticket) paid by the attendee or absorbed by the organizer, with premium subscription tiers offering advanced analytics and dedicated support for large-scale events.
Recommended architecture
Modular monolith with event-driven components
This pattern allows for rapid development and deployment of core features, leveraging a single codebase for initial velocity. Key functionalities like ticket issuance or check-in validation can be implemented as event-driven components, enabling high scalability and resilience for critical operations as the platform grows, without the overhead of a full microservices architecture from day one.
Recommended tech stack
- Frontend
- Next.js (React) with Tailwind CSS; Provides excellent SEO capabilities for event pages, server-side rendering for performance, and a modern, efficient development experience.
- Backend
- Node.js with NestJS framework; Offers a scalable, maintainable, and highly performant server-side environment, well-suited for I/O-bound operations like API requests and real-time updates.
- Database
- PostgreSQL with PostGIS extension; Chosen for its strong relational integrity, robust JSONB support for flexible event metadata, and spatial capabilities for venue mapping.
- Real-time / Messaging
- Apache Kafka; Essential for handling high-throughput event streams such as ticket purchases, check-in scans, and notifications, ensuring reliable, asynchronous communication between services.
- Infrastructure
- AWS (ECS Fargate for compute, RDS for PostgreSQL, S3 for static assets/ticket PDFs, Lambda for serverless functions, CloudFront for CDN); Provides a highly scalable, secure, and managed cloud environment.
- Authentication
- Auth0; A managed identity platform to handle user authentication (organizers, attendees, staff), roles, and permissions securely, reducing development overhead.
- Key third-party services
- Stripe (Payment processing for ticket sales), Twilio (SMS notifications for ticket delivery/updates), SendGrid (Email delivery for confirmations/marketing), Google Maps API (Venue location and mapping), Sentry (Error monitoring and performance tracking).
Core modules
Event Management Service
Handles creation, modification, and publishing of events, including venue details, schedules, and organizer information.
Ticketing & Inventory Service
Manages ticket types, pricing, availability, and unique code generation, ensuring real-time inventory synchronization across sales channels.
Order & Payment Service
Processes attendee orders, integrates with payment gateways, manages refunds, and handles financial reconciliation.
Attendee & CRM Service
Stores attendee profiles, manages communication preferences, tracks purchase history, and facilitates ticket transfers or modifications.
Check-in & Access Control Service
Validates tickets during check-in, manages staff permissions, enforces access rules, and logs entry/exit events, supporting offline operations.
Notification & Communication Service
Sends automated emails (confirmations, reminders) and SMS (ticket delivery, urgent updates) using templates and event-triggered logic.
Analytics & Reporting Service
Aggregates sales, attendance, and demographic data, providing organizers with real-time dashboards and customizable reports.
Key data model
| Entity | Key fields | Notes |
|---|---|---|
| User | id, email, password_hash, roles (organizer, attendee, staff), created_at | Indexed on email, unique ID. Roles determine access. |
| Event | id, organizer_id, name, description, start_time, end_time, venue_id, status (draft, published, cancelled) | Foreign key to User (organizer), indexed on start_time and status. |
| Venue | id, name, address, capacity, geolocation (latitude, longitude) | Indexed on name and geolocation (PostGIS). |
| TicketType | id, event_id, name, price, quantity_total, quantity_sold, sale_start, sale_end, is_seated_ticket | Foreign key to Event, indexed on event_id. Optimistic locking for quantity_sold. |
| Order | id, user_id, event_id, total_amount, currency, status (pending, paid, refunded), created_at, payment_intent_id | Foreign key to User and Event, indexed on user_id and status. |
| Ticket | id, order_id, ticket_type_id, unique_code (QR/barcode), attendee_email, status (purchased, scanned, cancelled, transferred), purchased_at | Foreign key to Order and TicketType, unique index on unique_code. Indexed on attendee_email and status. |
| CheckInScan | id, ticket_id, staff_user_id, scan_timestamp, device_id, scan_type (entry, exit) | Foreign key to Ticket and User (staff), indexed on ticket_id and scan_timestamp. |
Core API endpoints
| Method | Endpoint | Purpose |
|---|---|---|
POST | /api/v1/organizer/events | Create a new event with details and initial ticket types. |
GET | /api/v1/events/{eventId} | Retrieve detailed information for a specific public event, including available ticket types. |
POST | /api/v1/orders | Initiate a new ticket purchase order for an event, specifying ticket types and quantities. |
POST | /api/v1/orders/{orderId}/confirm | Confirm a payment for an existing order and trigger ticket issuance. |
GET | /api/v1/attendee/tickets | Retrieve all tickets belonging to the authenticated attendee. |
POST | /api/v1/checkin/scan | Process a ticket scan (QR/barcode) by event staff, validating entry and updating ticket status. |
GET | /api/v1/organizer/events/{eventId}/attendees | Fetch a paginated list of attendees for a specific event, with filtering options. |
PUT | /api/v1/organizer/tickets/{ticketId}/transfer | Initiate a ticket transfer to a new attendee email by an organizer or original attendee. |
GET | /api/v1/organizer/dashboard/analytics/{eventId} | Retrieve key sales, check-in, and revenue metrics for a specific event. |
Core screens
Event Creation Wizard (Organizer)
A multi-step form allowing organizers to input event details, define ticket types, set pricing, and configure event page branding.
Public Event Page (Attendee)
A visually appealing, customizable page displaying event description, schedule, venue info, and a clear call-to-action for ticket purchase.
Ticket Purchase Flow (Attendee)
A streamlined, secure checkout process for selecting ticket quantities, entering attendee details, and completing payment.
My Tickets / Order History (Attendee)
A personalized dashboard for attendees to view all purchased tickets, access QR/barcodes, manage transfers, and download invoices.
Organizer Dashboard (Organizer)
An overview of all active and past events, showing quick stats like total sales, upcoming check-ins, and links to detailed analytics.
Check-in Staff Mobile App (Staff)
A dedicated mobile interface for rapid QR/barcode scanning, manual lookup, issue resolution, and real-time check-in status updates.
Attendee List Management (Organizer)
A searchable and filterable list of all attendees for an event, with options to view individual ticket status, issue refunds, or resend tickets.
Scaling considerations
- **High Concurrent Ticket Sales:** Implement queueing mechanisms (Kafka) for order processing, use optimistic locking on ticket inventory, and leverage CDN for static content to absorb traffic spikes during popular event ticket releases.
- **Peak Check-in Traffic:** Design the check-in mobile app with robust offline capabilities, syncing data eventually. Distribute check-in servers geographically or auto-scale based on predicted event attendance and staff device count.
- **Real-time Analytics:** Utilize stream processing (Kafka Streams) to aggregate and analyze check-in and sales data in real-time, feeding into an optimized OLAP database or data warehouse for dashboards.
- **Mass Notifications:** Integrate with high-throughput email and SMS providers, and use a dedicated notification service with rate limiting and retry mechanisms to handle sending millions of messages for large events.
- **Data Volume for Historical Events:** Implement data archiving strategies for older events to cheaper storage (e.g., S3 Glacier) and use database partitioning or sharding to manage growing data volumes for active events.
Estimated monthly cost
Includes basic AWS services (ECS Fargate, RDS, S3), Auth0 starter, Stripe fees (variable), SendGrid/Twilio basic plans. Focus on managed services to minimize ops cost.
Increased AWS usage (more compute/storage, Kafka), Auth0 enterprise, higher third-party API usage, dedicated monitoring tools, initial data warehousing costs. Scaling for moderate event volume.
Extensive AWS infrastructure (EKS, Kinesis/Kafka clusters, larger RDS instances, global CDN), advanced security, dedicated DevOps team, premium third-party licenses, significant data analytics infrastructure. Handling major festivals/hundreds of events concurrently.
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Suggested build plan
| Phase | Timeframe | Deliverables |
|---|---|---|
| Phase 1: Core MVP - Event Listing & Basic Sales | Weeks 1-8 | Event creation, customizable event pages, basic ticket types, Stripe integration, attendee ticket purchase, email confirmation, organizer dashboard (event list, basic sales). |
| Phase 2: Check-in & Attendee Management | Weeks 9-16 | QR/Barcode generation, real-time check-in staff mobile app (Android/iOS), attendee list management for organizers, ticket transfer functionality, basic access control. |
| Phase 3: Enhancements & Analytics | Weeks 17-24 | Advanced analytics dashboard (sales trends, check-in rates), customizable seating charts, multi-day passes, SMS notifications, waiting lists, public API for event promotion partners. |
| Phase 4: Scaling & Platform Expansion | Weeks 25-32 | Performance optimizations for high-volume events, advanced fraud detection, white-labeling options, integration with CRM/marketing tools, self-service refund/cancellation for attendees. |
Frequently asked questions
How does EventLoop handle ticket scalping and fraud?
We implement unique, encrypted QR/barcode generation for each ticket, a strict one-scan-per-entry policy, and advanced algorithms to detect suspicious purchase patterns or rapid resales. Optional features like ID verification at check-in can also be enabled.
What if internet connectivity is lost during check-in at a remote venue?
Our check-in staff mobile app features a robust offline mode. It pre-downloads attendee lists and ticket data, allowing staff to continue scanning and validating entries. Data is automatically synced to the cloud once connectivity is restored.
Can organizers customize the look and feel of their event pages?
Yes, EventLoop provides a powerful customization editor. Organizers can upload banners, logos, choose color schemes, embed videos, and use rich text editing to fully brand their event pages to match their identity.
What kind of support is available for large-scale events or festivals?
For large events, we offer dedicated account managers, on-site technical support, custom integration services, and specialized scaling infrastructure to ensure smooth operations even under extreme load.
How does EventLoop ensure data privacy and security for attendees and organizers?
We adhere to industry best practices and compliance standards (e.g., GDPR, CCPA, PCI-DSS for payments). All data is encrypted in transit and at rest, and we conduct regular security audits and penetration testing.
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