Case Studies | Huzaifa Mustafa

E-commerce Integration

Shopware Import Optimization: 91% Faster for 530K SKUs

A German e-commerce client with over 530,000 SKUs was trapped in an operational nightmare with a 33-hour product import process. I engineered a high-performance API integration with optimized batch processing (dynamic batch sizing based on payload complexity), database index strategy (composite indexes on frequently queried fields), asynchronous queue system using Symfony Messenger for parallel processing, and Redis caching layer for category mappings and attribute lookups. Reduced import time from 33 hours to 2.8 hours, enabling real-time inventory management and daily catalog refreshes.

Key Technologies: Shopware 6, PHP 8, Symfony, REST API, MySQL, Redis, Messenger, Doctrine

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Automation

Shopware Zero-Touch Dropshipping Automation

A German dropshipping business struggled with manual order forwarding to suppliers, creating severe bottlenecks. I built a fully automated Shopware dropshipping fulfillment pipeline with multi-supplier routing logic that checks real-time stock levels, custom supplier portal with CSV import functionality, event-driven order processing with automated email notifications, and comprehensive error handling with monitoring dashboard. Reduced order processing time by 75% and eliminated manual errors.

Key Technologies: Shopware 6, PHP 8, Symfony, REST API, Event System, MySQL, Dropshipping

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Custom Plugin Development

Custom Tender Platform for Industrial Machinery Sales

An industrial machinery dealer needed to facilitate tender-based procurement for high-value equipment. I built a custom plugin that transforms Shopware checkout into a bidding interface with status-driven digital tender workflow (Submitted, Under Review, Approval Pending, Approved, Order Placed), customer tender dashboard with multi-checkout for bulk order placement of multiple approved bids, multi-level approval workflow with configurable routing rules, and Vue.js admin tender management dashboard. Onboarded 24+ enterprise customers and cut tender cycle time in half from 6 weeks to 3 weeks.

Key Technologies: Shopware 6, PHP 8, Symfony, Vue.js, MySQL, Custom Entities, B2B Platform

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Multi-Platform Plugin

Shopware Cross-Platform Charity Donation System

A charity organization initially needed a donation plugin for Shopware 5, then expanded to Shopware 6, Shopify, and WordPress. I built four completely separate native implementations, each leveraging its platform's best practices while delivering identical business functionality. Shopware 5 used ExtJS components and event subscribers, Shopware 6 leveraged entity definitions and DAL, Shopify used webhooks with Liquid integration and Polaris components, and WordPress used custom post types with WooCommerce integration. Despite different implementations, all four plugins provide 100% feature parity: donation tracking, tax receipt generation, donor management, reporting dashboards, and automated email notifications.

Key Technologies: Shopware 5, Shopware 6, Shopify, WordPress, PHP 8, JavaScript, MySQL, REST APIs, Webhooks

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Plugin Development

Shopware Enterprise Search Plugin: RC to Production with 100% Test Coverage

Took over maintenance of Findologic's Search and Navigation Plugin for Shopware when Shopware 6 was still in RC (release candidate). I rebuilt the plugin with a test-first approach, implementing comprehensive testing infrastructure achieving 100% code coverage with PHPUnit, GitHub Actions CI/CD pipeline with automated testing and releases, multi-version compatibility testing, and complete documentation and code quality standards. Progressed the plugin through multiple Shopware 6 releases from RC to version 6.4, transforming it into a production-grade enterprise solution used by major e-commerce operations.

Key Technologies: Shopware 5, Shopware 6, PHP 8, Symfony, PHPUnit, GitHub Actions, CI/CD, REST APIs

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Migration

Shopware 5 to 6.6 Migration Without Business Disruption

A small business faced end-of-life for Shopware 5 with zero tolerance for downtime or data loss. I executed a phased migration strategy with comprehensive data migration (customers, orders, products, categories while maintaining referential integrity), responsive theme redesign optimized for mobile, parallel systems running during transition, and complete functionality validation before final cutover. Achieved zero customer-facing downtime, 100% data integrity, and 28% increase in post-launch conversion rates through improved mobile optimization.

Key Technologies: Shopware 5, Shopware 6.6, PHP 8, MySQL, Twig, Symfony, Data Migration, Responsive Design

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ERP Integration

Shopware ERP Integration and Inventory Sync for 300K+ Pharmaceutical SKUs

A pharmaceutical distributor operating a Shopware storefront faced critical challenges managing 300,000+ pharmaceutical SKUs with individual batch tracking, expiry dates, and strict regulatory compliance. I architected a sophisticated bidirectional ERP integration system with two-way synchronization (ERP updates to Shopware, Shopware orders back to ERP), pharmaceutical-specific batch and expiry tracking with automated validation, predictive expiry alerts and inventory warnings, asynchronous job queues for high-volume processing, and comprehensive audit trails for regulatory compliance. Achieved zero fulfillment errors, automated pharmaceutical compliance, and sub-2-second sync times.

Key Technologies: Shopware 6, PHP 8, Symfony, MySQL, ERP API, Job Queues, Batch Tracking, Expiry Management

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Mobile Applications

Native Android apps serving thousands of users

Android App

My First Android App: Arabic Abjad Calculator Closing in on 1 Million Users

Developed in February 2012 as my first Android app, Adad Calculator calculates Abjad numerical values for Arabic text using both Mashriqi (Eastern) and Maghribi (Western) calculation systems. Published in 2013, the app has grown to 850K+ downloads with an exceptional 4.75 star rating, approaching the 1 million user milestone. What started as a learning project evolved into a comprehensive Arabic numerology tool serving students and scholars worldwide with real-time calculations, 11+ detailed letter statistics (repeating/non-repeating letters, sun/moon letters, connected groups), special calculation rules, and complete offline functionality maintained over 13+ years of Android evolution.

Key Technologies: Android, Java, Material Design 3, RecyclerView, BottomSheetDialogFragment, TextWatcher, HashMap, PreferenceScreen, ProGuard/R8

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Android App

Islamic Prayer Times App with Hijri Calendar for 105K+ Users

Built as a personal gift for my mother, Namaz Awqaat evolved into a community-serving Android app with over 105,000 users in the Dawoodi Bohra community. The app provides offline prayer time calculations using astronomical algorithms, a custom-built Hijri calendar system, and reliable prayer notifications that work across all Android versions and OEM restrictions. What started as a simple prayer times app became a comprehensive Islamic calendar with event tracking, widgets, and battle-tested notification delivery overcoming Android's evolving battery optimization restrictions.

Key Technologies: Android, Java, SQLite, AlarmManager, WorkManager, Material Design, Custom Calendar Algorithm, Google Play Services

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Android App

Islamic Astrological Timing App with Planetary Hour Calculations for 443K+ Users

Chogadia Hisab brings Islamic astronomical timing calculations to mobile devices, based on knowledge from the Ikhwan-us-Safaa kitaab studied at Aljamea tus Saifiyah. The app calculates 12 hours of day (sunrise to sunset) and 12 hours of night (sunset to sunrise), with each hour influenced by different planetary forces, using precise astronomical calculations. With 443K+ downloads and 4.4 star rating, it serves users worldwide with offline calculations, automatic GPS location detection, home screen widgets, and support for checking timings across thousands of cities. The app handles the complete date range from 1900-2100 with consistent astronomical precision.

Key Technologies: Android, Java, SQLite, WorkManager, Astronomical Calculations, ViewPager, GPS Location Services, BroadcastReceiver

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