• Developed an Android-based IoT Gateway Application serving as a secure bridge between Bluetooth Low Energy (BLE) devices and AWS IoT Core, enabling seamless bidirectional communication for real-time data exchange. • Implemented BLE (GATT) protocol to establish robust connections with IoT devices, ensuring reliable data transmission and efficient device management. • Integrated MQTT (Message Queuing Telemetry Transport) client to facilitate secure and scalable communication between the Android gateway and AWS IoT Core, enabling real-time monitoring and control of IoT devices. • Leveraged AWS Amplify to implement OAuth-based user authentication, enhancing security and privacy by ensuring only authorized users could access the system. • Enabled cloud-to-edge connectivity by bridging BLE devices with AWS IoT Core, empowering users to monitor and control IoT devices remotely via a centralized cloud platform.