Phenko Mat is a swipe-based app for giving away or selling things you no longer use to people nearby who need them. Think Bumble, but for stuff: instead of swiping on people, you swipe on items (a T-shirt, a chair, a lamp, school books) listed by people around you. Swipe right and you're connected with the owner. You chat, sort out the details, and pick the item up.
A swipe-based marketplace for nearby free or low-cost items.
Highlights
- Location-aware feed on PostgreSQL + PostGIS, using a partial GiST index and SQL ranking by distance, taste and freshness.
- Real-time chat through a Node.js WebSocket gateway with HMAC-signed tickets, read receipts and backoff reconnect.
- Secured API with Firebase Auth, CSRF checks and rate limiting; images stored on Cloudflare R2.
Tech stack
Mobile AppE-commerceSocialSwipe-basedCommunity