Keval D.

I design and build Flutter mobile applications that communicate with real-world smart devices using Bluetooth (BLE) and cloud IoT platforms. With 9+ years of mobile development experience, I help companies deliver stable, scalable, and production-ready mobile apps especially in IoT, BLE, and device-connected systems. 🧠 What I Specialize In Flutter & Mobile Architecture - Scalable Flutter apps using Clean Architecture - Modern state management (Riverpod, Bloc, Provider, GetX) - Platform channels for native Android & iOS integrations - Performance optimization and maintainable codebases BLE & Smart Device Integration - Bluetooth & BLE scanning, pairing, and reconnection logic - GATT services, characteristics, notifications - Reliable communication with smart devices (fans, sensors, health-care devices) IoT & Cloud Connectivity - AWS IoT Core integration using MQTT - Secure device-to-cloud-to-app communication - Telemetry, commands, and real-time updates - ThingsBoard SDK for device management and data visualization Backend & Real-Time Features - REST API integration - Authentication flows - Real-time communication (Socket-IO, Firebase) - Offline-first data sync strategies CI/CD & Release Automation - GitHub Actions for Flutter projects - Android & iOS Xcode build automation - Versioning and release pipelines - TestFlight & Play Store deployments 🛠 Technical Stack - Flutter / Dart - Android: Kotlin, Java - State Management: Riverpod, Bloc, Provider - BLE, NFC - AWS IoT Core, MQTT - ThingsBoard - SQLite, Drift, Hive - Firebase, AWS S3 - GitHub, GitLab, Bitbucket - CI/CD (GitHub Actions, Xcode) 🤝 Who I Work Best With - IoT startups & hardware companies - Agencies needing a senior Flutter engineer - Teams that need architecture ownership, not just task execution If your app involves BLE devices, smart hardware, or cloud-connected systems, I can help you build it right the first time. 🏆 Upwork Credentials - ⭐ Top Rated Freelancer (Top 10% on Upwork) - ✅ 100% Job Success Score - 💬 100% Client Recommendation Rate - 🌍 Long-term international client collaborations