Walid CHEBBI

– Collaborated within an Agile (SAFe SCRUM) team to enhance the Payment Solution module for Southwest Airlines. – Developed and maintained C++ features in a microservices architecture, utilizing Docker and OpenShift for containerization. – Designed a Python-based testing system to simulate client responses, improving backend testing efficiency.

– Collaborated with the embedded software team to enhance Vigik access control systems. – Developed and maintained embedded software in C and C++, improving product stability and reliability. – Utilized Git/GitHub for version control and implemented RS485 protocol for effective module communication. – Engaged with Qt 5.x and CMake for seamless interaction between desktop applications and embedded devices.

– Developed the iConnect-WS project using C/C++, implementing WebSocket protocol for real-time payment communication. – Designed and maintained a Python-based Proxy Server for secure transaction routing across distributed terminals. – Collaborated with international teams to deliver high-performance payment solutions while ensuring compliance with EMV standards.

# Player Performance Monitoring System Embedded IoT Project (Technologies: E-Health, ARM Cortex-M4, MATLAB, I²C, Firmware Development) ## Designed and implemented an embedded system to monitor and analyze the real-time physical activity of football players using IMU (Inertial Measurement Unit) sensors. Developed low-level firmware for an ARM Cortex-M4 microcontroller, enabling precise data acquisition from accelerometers and gyroscopes through the I²C communication protocol. Processed and visualized sensor data in MATLAB, creating algorithms for motion tracking, performance monitoring, and anomaly detection. Applied concepts from E-Health and IoT systems to collect, analyze, and interpret biometric and motion data, contributing to injury prevention and performance optimization. Ensured system reliability and accuracy through calibration routines, data filtering, and validation under different movement scenarios. Collaborated in a multidisciplinary environment combining embedded systems engineering, biomedical data analysis, and sports science.

Zigbee-GPRS Gateway Prototype — IoT Communication System (Technologies: Zigbee Protocol, SIM800L Module, Firebase, I²C, C Programming, AVR/ATmega328 Microcontroller) ## Designed and developed a Zigbee–GPRS Gateway prototype enabling wireless data transmission from Zigbee sensor nodes to a Firebase cloud server. Implemented embedded C firmware on an AVR ATmega328 microcontroller, ensuring reliable communication and data parsing between the Zigbee module and GPRS modem (SIM800L). Integrated Zigbee protocol for low-power sensor network communication and GPRS (SIM800L) for wide-area data transfer, achieving seamless connectivity between local devices and the cloud. # Configured Firebase database to store and visualize real-time sensor data transmitted from remote IoT nodes. Utilized I²C communication for peripheral interfacing and ensured system robustness through error-handling routines and signal validation mechanisms. Strengthened skills in IoT architecture design, embedded systems integration, and cloud data connectivity for real-time monitoring applications.

Smart green house gprs board – Allows the customer to visualize the change over time of his smart greenhouse Completed task: – Read sensor data – Transfer data to ThingSpeak server – Discover and manipulate the AT command used in the GPRS technology