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Sadda H.
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Sadda H.

Senior Android Engineer | AI/LLM Integration & Hardware/Kiosk Systems

I help startups and businesses transform complex ideas into polished, production-ready Android applications across B2B, B2C, and C2C ecosystems. From AI-powered mobile experiences to hardware-integrated kiosk systems and secure fintech solutions — I build apps that are fast, scalable, and built for real-world users. ━━━━━━━━━━━━━━━━━━ WHAT I SPECIALIZE IN ━━━━━━━━━━━━━━━━━━ 🤖 AI-Powered Android Applications • OpenAI GPT-4o Mini Integration • Groq LLaMA 3.1 (8B / 70B) • AI Chatbots & Smart Automation • Context-Aware Recommendations • AI-Driven Mobile Experiences 🏪 Kiosk & Hardware Integration • Offline-First Kiosk Applications • QR / Barcode Scanner Integration • NFC & RFID Systems • BLE / Bluetooth Devices • Cash Dispensers & Thermal Printers • External Hardware APIs 💳 FinTech, Payments & Security • Stripe (AUD / THB Multi-Currency) • PayPal, AfterPay & Google Pay • AES Encryption • Biometrics & 2FA • SSL Pinning & Secure Token Systems ━━━━━━━━━━━━━━━━━━ ARCHITECTURE & TECH STACK ━━━━━━━━━━━━━━━━━━ 📌 Architecture • MVVM • MVI • Clean Architecture • SOLID Principles 📌 Android Stack • Kotlin • Java • Jetpack Compose • Android SDK • XML Layouts 📌 Libraries & Tools • Hilt / Dagger2 • Room Database • WorkManager • DataStore • StateFlow / Coroutines • Retrofit / OkHttp • GraphQL & REST APIs • WebSockets ━━━━━━━━━━━━━━━━━━ PERFORMANCE & DEPLOYMENT ━━━━━━━━━━━━━━━━━━ • Memory & Battery Optimization • Smooth UI/UX Performance • GitHub Actions & Bitrise • Fastlane Automation • Google Play Store Compliance & Deployment ━━━━━━━━━━━━━━━━━━ WHY CLIENTS CHOOSE ME ━━━━━━━━━━━━━━━━━━ ✔ Technical Business Partner — I help shape product strategy, not just code features. ✔ Scalable Engineering — Built for long-term growth and maintainability. ✔ Pixel-Perfect UI — Clean implementation from Figma to Android. ✔ Reliable Communication — Clear updates and proactive collaboration. ✔ End-to-End Delivery — From idea validation to launch support. ━━━━━━━━━━━━━━━━━━ LET’S BUILD SOMETHING GREAT ━━━━━━━━━━━━━━━━━━ Whether you need: • An AI-powered Android app • A secure fintech solution • A kiosk or hardware-integrated system • App scaling/refactoring • Play Store deployment support I’m ready to help you deliver a world-class Android product. 📩 Click the “Invite” button and let’s discuss your project.

🇵🇰Sialkot, Pakistan$30/hr100% JSS5.00 (4)Since Apr 2014
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Earnings and projects

MRR
$109

Last 6 months ÷ 6

World#132,667 / 412k
🇵🇰Country#18,717 / 52.9k
Revenue, last 30 days
$378

Last 6 months: $653

World#69,672 / 412k
🇵🇰Country#8,951 / 52.9k
Total earnings
$9.1k

Billed in all: $9.1k

World#204,409 / 412k
🇵🇰Country#22,161 / 52.9k
Per project
$1.1k

$326 in the last 6 months

World#114,464 / 412k
🇵🇰Country#10,073 / 52.9k
Projects, last 6 months
2
100% fixed0% hourly
World#88,918 / 412k
🇵🇰Country#17,051 / 52.9k
Projects in all
8
100% fixed0% hourly
World#223,560 / 412k
🇵🇰Country#36,282 / 52.9k

Earnings, last 30 days

$9.1k+$378 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$8.6k$8.8k$9.0k$9.2kOct 8Oct 23Nov 7

Skill rankings: Top 20% in Android Studio

Ranked by MRR among everyone on Upwork with the skill.

  1. #8Kiosk27 freelancers · 🇵🇰 #5Top 30%
  2. #19Gaming Console36 freelancers · 🇵🇰 #4Top 53%
  3. #82iOS SDK351 freelancers · 🇵🇰 #14Top 23%
  4. #96Google Play282 freelancers · 🇵🇰 #33Top 34%
  5. #165Android Studio805 freelancers · 🇵🇰 #38Top 20%
  6. #181Android SDK805 freelancers · 🇵🇰 #33Top 22%
  7. #238Native App Development833 freelancers · 🇵🇰 #60Top 29%
  8. #461Hybrid App Development1,431 freelancers · 🇵🇰 #140Top 32%