DADU E-commerce
Modern Cross-Platform Retail Mobile App with Live Cart Sync & Dual Payment Gateways
Role
Lead Mobile Engineer & Architect
Platform
Android, iOS & Web
State Management
GetX
Database & Cloud
Firebase
Search Speed
+50%
Optimized indexing
Load Time
-35%
Cloudinary CDN cache
Platform
Android & iOS
Universal Flutter codebase
Architecture
Clean Arch
GetX reactive layers
Problem & Constraints
Mobile shopping platforms in emerging markets encounter high network latency, heavy media assets slowing down catalog scroll, and cart synchronization drops during intermittent 3G/4G connectivity.
Technical Implementation
Developed an in-memory client-side fuzzy search algorithm boosting product query speeds by 50%, alongside a dynamic Cloudinary CDN cache pipeline cutting image download overhead by 35%. Integrated GetX reactive controllers for instantaneous single-click checkout with automated bKash MFS and Stripe card token verification.
Technical Highlights & Innovations
Custom fuzzy search indexing algorithm improving product discovery speed by 50%
Optimized Cloudinary image pipeline reducing catalog render payload by 35%
Integrated bKash MFS & Stripe international payment gateway verification
Instant cart synchronization across multiple devices using Firebase Firestore sockets
Interactive customer review system with verified purchase badges
Key Product Capabilities
Dual Payment Flow (bKash & Stripe)
Seamless localized mobile banking via bKash API alongside international credit/debit card processing via Stripe SDK.
Instant Cart & Wishlist Synchronization
Real-time reactive state updates powered by GetX and Firestore for seamless multi-device persistence.
Smart Product Filtering & Fuzzy Search
Zero-latency product filtering by category, price ranges, brand, ratings, and instant character search.
Push Notifications & Order Tracking
Live step-by-step visual order tracking timelines with automated Firebase Cloud Messaging alerts.
System Architecture & Data Flow
Organized into distinct Presentation, Domain, and Data layers to guarantee testability, maintainability, and loose coupling.
Presentation Layer
Flutter UI widgets, responsive grid layouts, and GetX reactive observers (Obx).
Domain Layer
Pure Dart business entities, payment validation logic, and use-case handlers.
Data Layer
Firebase Firestore repositories, Cloudinary image providers, and local Hive cache.
Tech Stack & Dependencies
Frontend Framework
State Management
Backend & Cloud
Payments & APIs
Architecture & Tools
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