# Shahzaib Hassan — Senior Full-Stack Flutter Engineer

> Senior Flutter developer who builds, fixes, and takes complete technical ownership of production mobile apps for iOS and Android. 4+ years of production experience with zero-jank 120 FPS UI, real-time WebSockets, offline SQLite sync, and native platform channels.

- **Location:** Pakistan (UTC+5) • Remote worldwide
- **Live Portfolio:** https://www.shahzaib-dev.site
- **Contact:** shahzaibhassan414@gmail.com | WhatsApp: +92 316 0984600
- **Profiles:** [LinkedIn](https://www.linkedin.com/in/shahzaibhassan414/) | [GitHub](https://github.com/shahzaibhassan414) | [pub.dev](https://pub.dev/publishers/shahzaib-dev.site/packages)

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## What I Do

1. **Flutter App Development:** Turn Figma designs and backend APIs into fluid, App Store-ready iOS and Android apps from a single codebase. Clean architecture, modular state management (Bloc / Riverpod), and comprehensive test suites.
2. **Flutter Codebase Rescue:** Surgical audits and refactoring for failing apps. Eliminate frame drops, profile and plug memory leaks, rewrite spaghetti state, and unblock stalled releases.
3. **Flutter App Maintenance & SLA:** Ongoing production engineering. OS SDK bumps, crash triage with Sentry/Crashlytics, feature delivery, and App Store compliance.

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## Featured Work & Case Studies

- **[On Scene](https://www.shahzaib-dev.site/work/on-scene):** Location-based social platform with real venues, live check-ins, presence WebSockets, and hardware-accelerated 60 FPS map clustering.
- **[Zera](https://www.shahzaib-dev.site/work/zera):** Multi-vendor marketplace and events super-app with an offline-first SQLite database, sub-second search cache, and Google Maps heatmaps.
- **[StyleBite](https://www.shahzaib-dev.site/work/stylebite):** Fashion social feed featuring short-form video reels, interactive Vote & Win outfit contests, real-time chat, and smooth 60 FPS pagination.
- **[BePay](https://www.shahzaib-dev.site/work/bepay):** Consumer and merchant fintech wallets with biometric authentication (FaceID/TouchID), Web3Auth, DIDIT KYC/KYB, and encrypted ledger transfers.
- **[Paw Play Love](https://www.shahzaib-dev.site/work/paw-play-love):** Gesture-driven pet matching with location filters, real-time messaging, and RevenueCat subscription paywalls.

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## Complete AI Documentation
For full technical details, case study metrics, and API integrations, refer to:
- [llms.txt](https://www.shahzaib-dev.site/llms.txt)
- [llms-full.txt](https://www.shahzaib-dev.site/llms-full.txt)