Rhodium
Premium event management and ticketing platform tailored for Central Africa with real-time Mobile Money checkout.
Rhodium is a full-stack premium mobile ticketing and event discovery ecosystem. It enables event organizers to publish events, verify passes, and process real-time Mobile Money payments across Central African nations.
Event discovery and ticket sales in Central Africa suffer from high friction due to fragmented Mobile Money networks, unreliable venue connectivity, and outdated user interfaces.
THE TECHNICAL SOLUTIONA modern full-stack solution featuring a TikTok-style vertical event feed, an idempotent multi-telco payment reconciliation engine via webhooks, a bespoke 'Midnight Obsidian' design system, and QR gate verification.
Impact & Key Metrics
< 100ms
Average API response latency with NestJS Fastify on Bun
9
Mobile Money provider channels across 5 Central African countries
60 FPS
Frame rate stability on vertical full-screen event feed
Full Stack Specifications
Frontend & UI
- React Native 0.83
- Expo 55
- Expo Router
- Unistyles
- Legend State v3
- TanStack React Query v5
- Shopify FlashList
- Reanimated v4
Backend & Microservices
- NestJS v11
- Fastify
- Bun Runtime
- TypeScript
- Socket.IO WebSockets
- Zod Schema Validation
Database & Caching
- PostgreSQL
- Prisma ORM v7
DevOps & Tooling
- AWS S3
- Docker
- EAS OTA Updates
- Puppeteer PDF Engine
Third-Party APIs
- MTN MoMo API
- Airtel Money API
- Vodacom M-Pesa
- Orange Money
- Firebase Admin Push Notifications
- Google & Apple Social Auth
Key Architecture Decisions
Async Multi-Region Mobile Money Reconciliation Engine
Idempotent payment reconciliation service built in NestJS handling async telco webhooks (MTN, Airtel) and automatically issuing tickets and PDF invoices upon state verification.
60 FPS Immersive Vertical Event Explorer
Built a high-performance TikTok-style full-screen swipe feed utilizing Shopify FlashList and Reanimated worklets with integrated video playback and lazy asset loading.
'Midnight Obsidian' Design System & Reactive State
Created a bespoke design system featuring glassmorphism and deep dark obsidian palettes coupled with Legend State for fine-grained component re-rendering.
Core Features Breakdown
Geo-Aware Event Discovery & Carousel Feed
City/country filter selector with upcoming carousels, promoted hero banners, and lifestyle category groupings.
Full-Screen TikTok-Style Explorer Feed
Full-screen vertical event discovery with live view counter, heart animations, comment discussions, and deep-link shares.
Mobile Money Checkout & Ticket Management
Seamless Mobile Money ticket purchasing across multi-currency Telco providers with image/PDF export features.
Organizer Verification Scanner Gate
On-site entry verification tool enabling organizers to scan and mark digital tickets as used.