Mobile Engineering Case Study

MarketSpace NG

A production marketplace connecting buyers and sellers.

A marketplace app where users list and sell items, built for scale with efficient data fetching, caching, lazy loading, and ongoing performance optimization.

5,000+
Active Listings
Thousands
Users
Optimized caching & lazy loading
Performance
MarketSpace NG app screenshot
MarketSpace NG app screenshot
MarketSpace NG app screenshot
The Problem

Buyers and sellers needed a fast, reliable marketplace app that could scale to thousands of real users without performance degrading.

Engineered Solution

Built a Flutter marketplace app with optimized data fetching and caching, lazy loading, OneSignal push notifications, and in-app version-update prompts.

Key Outcome

Scaled to thousands of real-world users on a production marketplace supporting 5,000+ active listings.

Core Technical Features

Optimized Data Fetching & Caching

An efficient network layer with local caching to cut redundant fetches.

Lazy Loading

Progressive content loading for smooth scrolling at scale.

Push Notifications & Version Updates

OneSignal-powered alerts alongside in-app update prompts.

Architecture Patterns
  • Clean Architecture
  • Repository Pattern with Local Caching Layer
Technologies & Libraries
Flutter
Dart
OneSignal
Caching

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