Android App

Diggo POS Android

A comprehensive Point of Sale system for Android, featuring inventory management and transaction tracking.

Role: Lead Android EngineerTimeline: 2022 - 2023
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Project Overview

Diggo POS is a modern retail solution that aggregates inventory management, real-time sales reporting, and cash register flows. Built with standard clean design, it operates flawlessly offline and synchronizes data asynchronously when online.

Key Deliverables

  • ✓
    Offline-first operational state using SQLite/Room buffering
  • ✓
    Dynamic pricing grids and tax computation matrices
  • ✓
    Direct integration with Bluetooth ESC/POS receipt printers via Printer-ESC-POS
  • ✓
    Analytics chart interface for daily and monthly sales reporting

Project Links

GitHub Repository
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Tech Stack

KotlinAndroid JetpackRoom DatabaseRetrofitMPAndroidChart

Engineering Challenges

Data synchronization conflicts when running multiple POS terminals offline. Solved by implementing vector clocks and conflict-free replicated data strategies.

Resolved and implemented in production.