GrocerKey — Picker & Driver Fulfillment App

Android

About

Enterprise grocery operations app for in-store pickers, sorters, and drivers supporting the full order lifecycle.

My Role

Delivered end-to-end order fulfillment workflows, barcode scanning, driver tracking, SignalR-powered chat, and offline persistence.

Core Capabilities

• Barcode scanning (Scandit, Honeywell, ZXing, ML Kit CameraX)
• Real-time inventory accuracy and substitution workflows
• Route staging and delivery with background location tracking
• Live chat and SignalR sockets for order/driver updates

Architecture

• Kotlin + Java hybrid with Jetpack Compose, XML, DataBinding, ViewBinding
• MultiDex, WorkManager, Room for offline
• Custom Volley over OkHttp, SignalR for realtime
• RxJava for async orchestration

Tech Stack