Karnival Listings

City-based ad listing platform with deep geolocation, smart pagination, and a highly responsive local discovery engine.

Client

Karnival (com.karnival.android)

Services

Flutter App, Backend Mapping API

Timeline

8 Weeks

Platform

Android

The Challenge

Creating a highly performant local marketplace map application usually results in sluggish UI interfaces and massive data overhead when retrieving hundreds of closely clustered ads.

The client needed an app that could efficiently process real-time user location, query nearest ads ranging from real estate to vehicles, and permit instant, secure messaging between verified buyers and sellers.

Karnival Map interface
Messaging and Ad views

Our Solution

We designed a customized PostGIS-backed REST API capable of rapid spatial queries. The Flutter frontend integrates seamlessly through map clustering algorithms and highly refined smart filters, giving the feeling of instantaneous search.

Smart Geolocation

Fast spatial queries

Instant Messaging

Buyer to seller direct chat

User Verification

Secure transaction profiles

Deep Search Filters

Category, price, condition indexing

Building a two-sided marketplace?

Our map and search infrastructure handles millions of location queries.