⚡ Senior Mobile & Flutter Engineer | 1.5M+ App Downloads

Architecting High-Impact Mobile Apps Shipped to Millions.

Hi, I’m Morshedul Islam. I build production-grade, pixel-perfect iOS and Android applications. Currently crafting cross-platform solutions at Qtec Solution Limited, with production milestones including Mahfil (1M+ downloads), FeedBuddy, and Iungo Worlld.

1.5M+ App Downloads
1M+ Mahfil App Installs
5+ Years In Mobile
99.9% Crash-Free Rate
Specializations:
Flutter 3.x Dart BLoC Pattern Riverpod GetX Live Media Streaming Offline First (SQLite / Hive) Firebase Suite
Flutter Mobile Apps Showcase by Morshedul Islam
Morshedul Islam
Morshedul Islam Software Engineer
1M+ Installs on Mahfil Google Play & App Store
morshed@terminal: ~/flutter-engine
$ flutter run --release --dart-define=ENV=prod
✓ Launching lib/main.dart on iOS & Android in release mode...
✓ Clean Architecture initialized (Presentation | Domain | Data)
✓ State engines: BLoC / Riverpod / GetX reactive stream bound
⚡ Frame budget: 60fps locked (16.6ms) | 1M+ users concurrency verified
$ ready_for_client_deployment

Engineering With Precision & Scale

Bridging user empathy, high-concurrency streaming, and enterprise software architecture.

Morshedul Islam

Morshedul Islam

Software Engineer & Mobile Application Architect

Flutter Developer @ Qtec Solution Limited

For over 5 years, I have specialized in architecting and shipping mission-critical Android and iOS applications. My apps have collectively garnered over 1.5 Million+ downloads, including Mahfil (1M+ downloads), delivering fast, scalable, and responsive experiences across diverse industries.

Whether building complex livestock nutrition calculators like FeedBuddy, live social sports streaming platforms like Iungo Worlld with Riverpod, or high-scale e-commerce engines with offline cart persistence, my engineering philosophy centers on clean code, predictive state management, and strict performance profiling.

📱

Dual-Platform Mastery

Native-level feel on both iOS and Android from a single optimized Dart codebase.

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High-Concurrency Streaming & Scale

Experience handling 1M+ user loads with BLoC, Riverpod, and low-latency live media feeds.

🏗️

Enterprise Architecture & Teamwork

Clean Architecture, collaborative Git workflows, automated testing, and App Store approval.

Engineering DNA

Flutter & Dart Production Depth 5+ Yrs
State Architecture (BLoC, Riverpod, GetX) Expert
Live Streaming & Media Playback (HLS/Exo) Advanced
Local Data Persistence (SQLite, Hive) Advanced
Team Collaboration & CI/CD Fastlane Pro
Ready to launch or scale your mobile app? Available for client contracts, technical consulting, and full-stack mobile development.
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Production Apps in the Wild

Real apps on Google Play & App Store serving millions of users with high ratings and scale.

FeedBuddy Cattle Feed Ration App
Android Flagship
01 Livestock Nutrition & Smart Ration Calculator

FeedBuddy : Cattle Feed Ration (Feed Buddy Pro)

The smartest, easy-to-use livestock feed ration calculator app designed for dairy farmers, beef fattening owners, and cattle nutritionists. Features precision feed formulation formulas, nutritional matrix balancing, and complete offline capability for remote farmland use.

Feed Ration Math Algorithms SQLite Offline Storage Dairy & Beef Nutrition Matrices Multi-Language PDF Report Generation
Mahfil Islamic streaming app UI
Android 🔥 1M+ Downloads
02 High-Scale Islamic Media Streaming

Mahfil — Islamic Streaming App

Massive-scale Islamic streaming platform with over 1 Million downloads. Developed collaboratively within an agile engineering team using BLoC state management, high-concurrency media streaming players, background audio playback, and comprehensive multi-language support.

1M+ Downloads Scale BLoC State Management Video & Audio Streaming (HLS) Team Collaboration Multi-Language (i18n) Background Audio Services
Iungo Worlld Social Sports App
Android Live Streaming
03 Social Sports & Multimedia Streaming

Iungo Worlld — Premier Social Sports Platform

A premier global social sports ecosystem connecting athletes and fans. Empowers sports culture by creating social, economic, and career opportunities through interactive multimedia content, real-time live streaming feeds, and athlete portfolios.

Riverpod State Architecture Live Video Streaming Athlete Profiles & Scouting Multimedia Feed & Reels Interactive Chat & Reactions
WhereTo Event Management App UI
Android iOS
04 Event Discovery & Ticketing

WhereTo — Events & Deals Platform

Dual-platform mobile ecosystem for discovering local concerts, gatherings, and promotions. Built with instantaneous caching, geolocation filtering, and digital ticketing.

GetX State Architecture Hive Local NoSQL Multi-Language (i18n) Geolocation & Maps QR Scanner
Najjo Mullo E-Commerce App
Android
05 E-Commerce Marketplace

Najjo Mullo — Fair-Price E-Commerce

High-scale retail platform delivering fair prices directly to consumers. Architected with robust local database caching, seamless cart state, and multilingual localization.

GetX State Manager SQLite Database Multi-Language Payment Integration Order Tracking
Agricare Agro Investment App
Android
06 FinTech & Agro Investment

Agricare — Smart Agro Investment

Agricultural investment and farm portfolio management tool. Empowering investors with real-time crop cycle tracking, ROI analytics, and transparent financial statements.

GetX Reactive Engine SQLite Architecture Data Visualizations Multi-Language Fintech Security
Chardike E-Commerce App
Android
07 E-Commerce with BLoC

Chardike — Lifestyle Shopping App

Modern e-commerce platform built around strict unidirectional state flow with BLoC. Zero state corruption across complex product filters, shopping cart, and checkout.

BLoC Pattern SQLite Storage Multi-Language Smooth 60fps Scrolling Offline Cart
Echem B2B E-Commerce App
Android
08 Industrial & Enterprise E-Commerce

Echem — Chemical & B2B Marketplace

Specialized enterprise platform for chemical product supply chains. Features multi-factor authentication (Google & Phone OTP), real-time Firebase notifications, and order dispatches.

BLoC State Flow Firebase Auth & OTP Firebase Cloud Messaging SQLite Multi-Language

Software Engineering Standards

How I write scalable, testable, and maintainable code that saves clients months of technical debt.

Layered Clean Architecture Pattern

Every app I construct follows strict separation of concerns. This ensures business logic remains independent of UI components and external third-party services.

  • Presentation Layer: Dumb widgets, declarative UI, animations, and reactive state observers (BlocBuilder / Riverpod ConsumerWidget).
  • Domain Layer: Pure Dart business logic, UseCases, value objects, and repository contracts. No Flutter framework dependency.
  • Data Layer: Concrete repository implementations, API clients (Dio/Http), JSON parsers, and local storage (SQLite/Hive).
Repository Pattern Dependency Injection Decoupled UI
lib/features/product/domain/usecases/get_products.dart Dart
class GetProductsUseCase {
  final ProductRepository repository;
  
  const GetProductsUseCase(this.repository);

  Future<Either<Failure, List<Product>>> call({
    required int page,
    String? category,
  }) async {
    // Pure domain validation & offline fallback
    return await repository.fetchProducts(
      page: page,
      category: category,
    );
  }
}

Predictable & Scalable State Engines

Choosing the right tool for the job. For apps with massive 1M+ concurrency like Mahfil, I employ BLoC for testable unidirectional data flows. For complex dependency graphs and live streaming like Iungo Worlld, I use Riverpod.

  • Zero State Leaks: Immutable event streams with proper stream controller and provider disposal.
  • Riverpod Dependency Graph: Compile-safe dependency overrides and state caching for live video streams.
  • Testable State Machines: Every state transition is traceable and unit-testable without launching the emulator.
BLoC 8.x Riverpod 2.x GetX State
lib/features/streaming/presentation/controllers/stream_controller.dart Dart
// Riverpod Live Stream State Provider
final liveStreamProvider = AsyncNotifierProvider<LiveStreamNotifier, StreamState>(() {
  return LiveStreamNotifier();
});

class LiveStreamNotifier extends AsyncNotifier<StreamState> {
  @override
  Future<StreamState> build() async {
    return ref.watch(streamRepoProvider).fetchActiveLiveFeed();
  }
}

60fps & Sub-Second Latency Budget

Clients praise my apps for silky smooth scrolling and zero stutter, even with 1M+ downloads. I actively profile frame render times and memory usage on low-end hardware.

  • Tree-Shaking & Shaders: Impeller engine optimization, warmup shaders, and stripped unused symbols.
  • List Virtualization: Efficient ListView.builder and CustomScrollView slivers with image memory limits.
  • Media Buffering: Low-latency HLS video chunks with proactive buffer caching and smooth failover.
DevTools Profiler Memory Leak Zero Impeller Ready
Engineering Metrics Dashboard Benchmarks
## PRODUCTION BENCHMARKS
[Startup Time]       Cold Start: 780ms  (Target: <1.2s)
[Frame Budget]       16.6ms avg (60 FPS Locked)
[Top App Scale]      1,000,000+ Downloads (Mahfil)
[Jank Occurrences]   0.06% of total scroll frames
[Crash-Free Rate]    99.94% (Firebase Crashlytics)
[RAM Footprint]      Idle: 42MB | Peak Streaming: 98MB

Fault-Tolerant Offline Data Sync

Network dropouts shouldn't break a client's business. In apps like FeedBuddy, calculations and farm records function completely offline with local SQLite storage.

  • SQLite Local Engine: Relational queries, complex ration schemas, and indexed search.
  • Hive Key-Value Store: Lightning-fast NoSQL binary storage for sessions, media cache tokens, and preferences.
  • Background Sync Queue: Auto-retry mechanism for pending checkouts and user submissions with exponential backoff.
SQLite Hive DB Offline Sync
lib/core/database/local_sync_service.dart Dart
class OfflineSyncService {
  final Database db;
  final ConnectivityService network;

  Future<void> syncPendingMutations() async {
    if (!await network.isConnected) return;
    final queue = await db.query('pending_actions');
    for (final action in queue) {
      await dispatchToServer(action);
      await db.delete('pending_actions', where: 'id = ?', whereArgs: [action['id']]);
    }
  }
}

Skills & Technologies

Battle-tested tools and frameworks I use to engineer robust mobile platforms.

📱

Mobile & Languages

  • Flutter (3.x)
  • Dart
  • Java (Android)
  • Kotlin basics
  • iOS & Android SDKs
  • Native App Development
  • Multi-Platform Architecture
⚙️

State Management

  • BLoC Pattern
  • Riverpod
  • GetX
  • Provider
  • Reactive Streams (RxDart)
  • Cubit
  • Unidirectional Data Flow
📡

Media & Live Streaming

  • Live Video Streaming (HLS)
  • Audio Background Playback
  • ExoPlayer / AVPlayer
  • Real-time WebSockets
  • Multimedia Feeds & Reels
  • Video Caching Pipelines
💾

Databases & Storage

  • SQLite / sqflite
  • Hive (NoSQL)
  • Shared Preferences
  • Offline Data Caching
  • Database Migrations
  • Encrypted Local Storage
☁️

Firebase & Cloud

  • Firebase Auth (Google, Phone OTP)
  • Cloud Messaging (FCM Push)
  • Crashlytics & Analytics
  • Cloud Firestore
  • RESTful APIs
  • Dio / HTTP Client
🛠️

DevOps & Release

  • Google Play Console Publishing
  • Apple App Store Connect
  • Git & Agile Team Workflows
  • CI/CD Fastlane
  • Figma-to-Flutter Translation
  • Unit & Widget Testing

Work Experience

Consistent delivery across corporate environments, high-scale agile teams, and independent client engagements.

Current Position 2021 — Present

Flutter Developer

Qtec Solution Limited

Leading mobile application development lifecycle for client projects and internal software suites. Architecting modular Flutter codebases for both Android & iOS, standardizing state management with BLoC and Riverpod, and optimizing app load speeds by 40%.

Enterprise Apps Team Collaboration Code Reviews CI/CD
Independent & Scale Engagements 5+ Years Overall

Senior Mobile Software Engineer

Global Founders & High-Scale Production Teams

Collaborated within multidisciplinary engineering teams to build, scale, and publish top-tier mobile apps. Delivered Mahfil to 1M+ downloads on Google Play Store and built dedicated solutions like FeedBuddy and Iungo Worlld with 99.9% crash-free stability.

1M+ Downloads Milestone High-Scale Media Riverpod & BLoC App Store Releases

What Clients Can Count On

Predictable, transparent, and high-velocity mobile engineering.

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Proven at 1M+ Scale

Direct track record delivering apps with over 1 Million downloads, keeping memory usage minimal and user retention high.

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Store-Ready Excellence

Zero shortcuts. Full compliance with Google Play Store & Apple App Store review guidelines for guaranteed approvals.

🧩

Clean Code Handover

Documented architecture, maintainable repository structures, and thorough onboarding for your future developers.

🤝

Team & Async Delivery

Fluent English & Bengali updates, collaborative Git PR workflows, and thoughtful architectural suggestions that save budget.

Let’s Build Your Next Top-Tier Mobile App

Have a new app idea, need an experienced Flutter engineer on your team, or want to scale an existing application? Let’s connect today.

WhatsApp & Call +880 1680 124836
✉️
Email Address morshedislam21@gmail.com
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Location & Timezone Dhaka, Bangladesh (UTC+6) • Available Worldwide
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Current Status ● Open for Remote Contract & Full-time Roles

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