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.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $653
Billed in all: $9,124$9.1k
$326 in the last 6 months
Earnings, last 30 days
Skill rankings: Top 20% in Android Studio
Ranked by MRR among everyone on Upwork with the skill.
- #8Kiosk27 freelancers · 🇵🇰 #5Top 30%🇵🇰#5 of 10
- #19Gaming Console36 freelancers · 🇵🇰 #4Top 53%🇵🇰#4 of 5
- #82iOS SDK351 freelancers · 🇵🇰 #14Top 23%🇵🇰#14 of 46
- #96Google Play282 freelancers · 🇵🇰 #33Top 34%🇵🇰#33 of 73
- #165Android Studio805 freelancers · 🇵🇰 #38Top 20%🇵🇰#38 of 179
- #181Android SDK805 freelancers · 🇵🇰 #33Top 22%🇵🇰#33 of 146
- #238Native App Development833 freelancers · 🇵🇰 #60Top 29%🇵🇰#60 of 186
- #461Hybrid App Development1,431 freelancers · 🇵🇰 #140Top 32%🇵🇰#140 of 409