Design architecture, oversee full software lifecycle, and implement end-to-end systems for enterprise software. Manage tasks, generate project plans and schedule estimates, and delegate tasks within a team of 5 members. Provide training to team members, manage bug handling processes, and ensure performance, scalability, and stability. Review, optimize, and maintain code following development standards and conventions. Build an access control system using facial recognition cameras to allow users to unlock doors. Develop and fine-tune AI models for object and human detection to count the number of people in a building. Create software/middleware for controlling cameras and CCTV using vendor API and SDK, managing motion detection, intrusion, and face detection events. Research, develop, and integrate communication protocols using third-party cloud APIs, such as TTLock Cloud, Tuya Cloud, SmartThings Cloud, and Google Cloud, to control and collect data from locks, sensors, lights, and doorbells. Develop RESTful APIs for mobile and web integration. Deploy a Google Cloud Function to manage IoT devices via Google Assistant. Design a file server using Node.js, with MongoDB and PostgreSQL for cloud storage and MySQL for local servers. Create a cloud platform for a smart home system using open-source software to manage millions of users and IoT devices. Develop an OTA server for remote updates using shell scripts (APT). Establish an intercom server for video calls among web and mobile app users. Research and implement a VPN solution for communication among users across different networks. Develop a mobile app to test APIs and design test cases for backend API evaluation. Build and customize a VMS desktop application for a VSaaS platform using Network Optix source.

Build and optimize a machine learning model for few-shot learning tasks on constrained datasets. Implement and evaluate models for speech recognition, gesture detection, and image classification tasks while reducing model size for IoT deployment. Develop drivers and firmware for low-power IoT devices equipped with wireless transceivers. Write radio drivers, MAC layer, and algorithms, then upload binary for experimental purposes. Analyze academic papers to propose novel ideas and improvements for ongoing projects.

Develop, maintain, and resolve issues related to software and Android applications for Samsung mobile devices. Collaborate with chipset vendors, including Qualcomm, Marvell, and Samsung Exynos, to implement Trustzone, BSP, security modules, and apply Linux patches for Android devices. Execute the signing of public and private keys for trusted applications using a sign server system and Python scripts in a Linux environment. Design test cases and verify security patches; update Linux kernel and secure OS for Android systems. Integrate, maintain, and resolve issues related to security modules such as keymaster, gatekeeper, fingerprint, and lock screen within the Android OS. Build binaries, firmware, and release new software versions for smartphones and tablets. Run the Compatibility Test Suite (CTS) to identify issues and compatibility problems with every new Android version release.

Designed the layout and PCB for an embedded system using STM32 MCU, nRF24N01 transceiver, and a camera. Developed firmware for the MCU to control the image sensor and wireless transceiver. Implemented software for the computer to communicate with the system via USB port.