Passa

Passa

A next-generation ticketing and event management ecosystem replacing ad-dependent marketing with decentralized referrals.

99.9%

Uptime maintained during high-concurrency 'flash sale' ticket drops.

<1s

Sub-second validation times reducing entry bottlenecks at crowded venues.

Lower CAC

Reduction in Customer Acquisition Costs (CAC) via organic peer-to-peer reach.

Attribution

Clear visibility into influencer performance and social-growth referral tracking.

"By gamifying social sharing and incentivizing ticket-holders to become promoters, the platform lowers customer acquisition costs for event organizers while increasing attendance density."

Passa

TICKETING ECOSYSTEM

We needed to build a highly available infrastructure capable of handling burst traffic during exclusive 'drop' releases, while also engineering a low-latency 'Door Mode' that operates seamlessly in high-density offline environments.

Project UI

Social-Growth Ticketing Engine tracks attendee influence and rewards successful referrals.

Creator Studio Dashboard real-time hype tracking, audience insights, and automated payouts.

Door Mode Entry high-speed scanning and hybrid recording for physical/digital sales.

Webhook-heavy Architecture ensures real-time sales notifications and gate status updates.

Decentralized Marketing and Scalable Event Processing.

Passa redefines event ticketing by turning fans into distribution channels. Through robust attribution models, modular webhook integrations, and a highly optimized gate logic tailored for the nightlife scene in Accra, Passa seamlessly bridges digital hype with physical event execution.

Project UI
TECHNICAL DEEP DIVE

Implementation Overview

Architecture decisions, engineering challenges, and how they were solved.

Next.jsTypeScriptNode.jsPostgreSQLPrismaRedisStripeQR Code SDK
01

Webhook-First Event Architecture

Designed the entire payment and notification pipeline around webhook events rather than polling, enabling real-time sales updates, instant gate-status changes, and reliable third-party payment reconciliation.

02

Offline-First Door Mode

Built a Progressive Web App scanner that caches the event manifest locally and validates QR tickets against a local SQLite store, syncing deltas when connectivity is restored — critical for Accra nightlife venues with unreliable WiFi.

03

Referral Attribution via Signed Tokens

Each shared ticket link contains a cryptographically signed referral token that tracks the full attribution chain. This enables multi-level commission payouts without exposing user PII in the URL.

Handling burst traffic during exclusive 'drop' releases

Implemented a distributed queue with Redis Streams fronting the ticket purchase API. Incoming requests are enqueued and processed with rate-limited workers, preventing database connection exhaustion during 10K+ concurrent drop attempts.

Sub-second QR validation in offline venue environments

Pre-loaded encrypted ticket manifests to the Door Mode PWA during event setup. Scanning validates against a local IndexedDB store with HMAC verification, achieving <200ms validation times without any network dependency.

Accurate multi-level referral attribution at scale

Built a directed acyclic graph (DAG) of referral relationships stored in PostgreSQL with recursive CTEs for payout calculation. Batch processing runs async via a cron-triggered worker to avoid blocking the main transaction path.

99.9% uptime maintained during high-concurrency flash sale drops

<200ms offline QR validation time in Door Mode

35% reduction in customer acquisition costs via organic referral engine

Real-time webhook pipeline processes 50K+ events/hour during peak