# Hayat Khan — Senior Flutter Developer & Mobile App Architect

> Senior Flutter Developer with 3+ years of experience shipping 20+ production-grade mobile applications for iOS & Android. Expert in Clean Architecture, BLoC/Riverpod, Firebase, and payment gateway integrations (Stripe, PayPal, Hyperwallet). Author of widely used open-source Flutter packages on pub.dev.

## Quick Facts for Recruiters & Hiring Managers
- **Name:** Hayat Khan
- **Primary Role:** Senior Flutter Developer / Mobile App Architect / Cross-Platform Engineer
- **Experience:** 3+ Years in Production Mobile Development
- **Apps Shipped:** 20+ Production Applications on Apple App Store & Google Play Store
- **Open-Source Contributions:** Author of `progressive_video_cache`, `Pagy`, and `App Logger` packages on pub.dev
- **Core Specialities:** Clean Architecture, BLoC, Riverpod, Firebase, Payment Gateways, Real-time WebSockets, Video/Audio Streaming (Agora/WebRTC)
- **Work Status:** Available for Senior Flutter Roles, Contract Projects, Mobile App Architecture Consulting, and Full-time Engineering Opportunities
- **Contact:** hayatkhan626225@gmail.com
- **Website:** https://hayatkhan.tech
- **GitHub:** https://github.com/hayatkhan67
- **LinkedIn:** https://www.linkedin.com/in/hayatkhandev/
- **Fiverr Profile:** https://www.fiverr.com/johnmicheal100?public_mode=true

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## Technical Skills & Expertise

### Mobile App Development
- **Frameworks & Languages:** Flutter, Dart, iOS (Swift / Xcode), Android (Kotlin / Gradle)
- **Architecture & Design Patterns:** Clean Architecture, Layered Architecture, Feature-First Architecture, SOLID Principles, Dependency Injection (GetIt, Injectable)
- **State Management:** BLoC / Cubit, Riverpod, Provider, GetX
- **UI & UX:** Pixel-Perfect Responsive UI, Custom Animations, Shimmer Effects, Light & Dark Mode, Accessibility (a11y)

### Backend & Integrations
- **Cloud & Backend Services:** Firebase (Authentication, Firestore, Cloud Messaging/FCM, Cloud Functions, Remote Config, Crashlytics), RESTful APIs, WebSockets, GraphQL
- **Payment Solutions:** Stripe, PayPal, Hyperwallet, In-App Purchases (RevenueCat / StoreKit / Google Play Billing)
- **Media & Real-time Communication:** Progressive Video Caching, WebRTC, Agora SDK (Audio & Video Calling), Image Compression & Caching

### DevOps & Engineering Excellence
- **Version Control & CI/CD:** Git, GitHub Actions, Codemagic, Bitrise, Fastlane
- **Quality Assurance:** Unit Testing, Integration Testing, Widget Testing, Code Reviews, Mentoring, Performance Optimization & Memory Profiling

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## Published Open-Source Flutter Packages (pub.dev)

1. **progressive_video_cache**
   - *URL:* https://pub.dev/packages/progressive_video_cache
   - *Description:* High-performance Flutter package for progressive video caching, enabling seamless video playback, preloading, and media streaming in mobile apps.

2. **Pagy**
   - *URL:* https://pub.dev/packages/pagy
   - *Description:* Lightweight, zero-dependency customizable Flutter package for implementing clean and efficient pagination and shimmer loading in mobile apps.

3. **App Logger**
   - *URL:* https://github.com/hayatkhan67/app_logger
   - *Description:* Advanced Flutter logging and debugging utility featuring formatted, color-coded output and file logging for production debugging.

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## Key Production Applications & Portfolio Projects

- **Ride-Sharing & Logistics App:** Real-time driver tracking, socket-based location updates, Stripe payment processing, and fare calculation.
- **FinTech & Digital Wallet Platform:** Multi-currency transactions, secure authentication, Stripe/Hyperwallet integration, and ledger transaction tracking.
- **Dating & Social Networking App:** Real-time chat, matchmaking algorithm, geolocation distance filtering, and push notifications.
- **Appointment & Service Booking App:** Interactive calendar scheduling, provider management, automated reminders, and payment processing.
- **Travel & Tour Booking Platform:** Itinerary generation, booking engine, real-time availability, and offline data sync.

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## Recognition & Awards
- **Employee of the Year 2024** — LaunchBox Global (Recognized for exceptional technical performance, code quality, and delivery speed).
- **Top Performer 2024** — Led mobile architecture decisions and mentored junior developers across multiple production releases.

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## Links & Verification
- **Portfolio & Case Studies:** https://hayatkhan.tech
- **GitHub Repository:** https://github.com/hayatkhan67
- **LinkedIn Profile:** https://www.linkedin.com/in/hayatkhandev/
- **pub.dev Packages:** https://pub.dev/publishers/hayatkhan.tech/packages (or https://pub.dev/packages/progressive_video_cache)
- **Email Contact:** hayatkhan626225@gmail.com