# Shipped Work & Engineering Case Studies — Obada Dallo

> Complete catalog of shipped software products and R&D engineering prototypes built by Obada Dallo.

- **Canonical URL**: https://obadadallo.web.app/work/

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## Primary Shipped Products

### 1. KeyFixer (Cross-Platform Typing Fixer)
- **Live Channels**: Mac App Store, Microsoft Store, Chrome Web Store, Web
- **Delivery Timeline**: 27 days from initial commit to all stores (Jul–Aug 2026)
- **Tech Stack**: React, TypeScript, Rust, Tauri v2, Chrome Extension MV3, Vitest, GitHub Actions
- **Core Problem**: Accidental typing in wrong keyboard layout (QWERTY ↔ Arabic 101/Mac).
- **Architecture**: Pure TypeScript core reused across all 4 targets; Tauri v2 desktop bridge; native macOS NSServices Instant Fix without Accessibility permissions.
- **Store Review Engineering**: Automated build preflights (Guideline 2.1a) and platform-compliant NSServices architecture (Guideline 2.4.5).
- **Approved Release**: KeyFixer 1.3.1 for macOS & KeyFixer Pro Lifetime (Non-Consumable).
- **Case Study**: [https://obadadallo.web.app/work/keyfixer/](https://obadadallo.web.app/work/keyfixer/) | [Markdown Mirror](https://obadadallo.web.app/work/keyfixer.md)

### 2. Eagle Test Germany (EdTech Citizenship Exam App)
- **Live Channels**: Apple App Store & Google Play
- **Supported Languages**: 7 (en, de, ar, tr, uk, ru, fa)
- **Tech Stack**: Flutter, Dart, Riverpod, Hive, RevenueCat, SQLite
- **Architecture**: 100% offline-first exam simulation with local Hive key-value storage and RevenueCat in-app subscriptions.
- **Case Study**: [https://obadadallo.web.app/work/eagle-test-germany/](https://obadadallo.web.app/work/eagle-test-germany/) | [Markdown Mirror](https://obadadallo.web.app/work/eagle-test-germany.md)

### 3. B-Yadina — بإيدنا القرار (Civic Incident Follow-up Platform)
- **Live URL**: [https://b-yadina-official.web.app/](https://b-yadina-official.web.app/)
- **Verified August 2026 Metrics**: 1,308 visitors, 49 reports, 34 currently under processing, 36 registered initiative members.
- **Tech Stack**: React, TypeScript, Firebase Auth/Firestore, Leaflet Maps, Tailwind CSS
- **Architecture**: Geospatial report mapping with role-based Firestore Security Rules.
- **Case Study**: [https://obadadallo.web.app/work/b-yadina/](https://obadadallo.web.app/work/b-yadina/) | [Markdown Mirror](https://obadadallo.web.app/work/b-yadina.md)

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## R&D & Prototypes

- **Agent Preflight**: Automated evaluation & security harness for LLM agents (Devpost / OpenAI Build Week 2026 prototype).
- **Sada Messenger**: Offline-first BLE mesh communication prototype built with Android Kotlin.
- **LinkedIn Authority Engine**: Automated editorial pipeline for professional reach (Active development).
- **Start Ex**: Multi-brand digital platform engine with shared component design system.