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Marketplace · Social10 monthsSenior React Native Developer
Streetgains
Social Marketplace
Social commerce marketplace connecting local sellers and buyers with real-time messaging, geolocation discovery, and seamless transaction flows.
5K+
Daily active users
20%
Faster interactions
Real-time
Messaging delivery
2
Platform launch
React NativeGraphQLNode.jsReal-time ChatMaps
Product Preview
The Challenge
Connecting buyers and sellers in real time
- —The platform needed to combine marketplace listings with social features — profiles, messaging, and location-based discovery.
- —Real-time chat between buyers and sellers was critical for conversion but added significant technical complexity.
- —Geolocation features had to scale as user density grew across regions.
Product Goals
- ✓Build real-time messaging that feels instant and reliable
- ✓Implement location-based product discovery
- ✓Scale to thousands of concurrent users
The Solution
Real-time marketplace with GraphQL and WebSocket architecture
- —Designed GraphQL API layer with optimized queries for feed and listing performance
- —Implemented WebSocket-based chat with offline message queuing
- —Built geolocation search with map clustering for dense urban areas
Architecture
- ✓React Native with Apollo GraphQL client
- ✓WebSocket subscriptions for real-time chat
- ✓Redis-backed caching for feed performance
- ✓Image optimization pipeline for listing photos
Technical Highlights
How It Was Built
GraphQL & Apollo Client
WebSocket real-time chat
Geolocation & map clustering
Image upload & CDN
Push notifications
Deep linking
Lessons Learned
- →Marketplace apps live or die on messaging reliability — invest early
- →GraphQL query design directly impacts mobile performance
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