Walid Chebbi

Development of high-throughput payment microservices in C++17 running on Linux RedHat. Worked on backend payment and authorization services, handling concurrent transaction flows. Experience with multithreaded server-side components to ensure scalability and availability. Developed Python tools to isolate test environments and reduce load on customer systems. Participated in CI/CD pipelines using Jenkins, and worked with Kafka for backend messaging and event handling. Contributed to algorithmic logic for transaction processing, validation, and routing. Collaborated with an international team on code integration, reviews, and bug fixes in an Agile Scrum environment.

Participated in the development of a Qt-based configuration tool for communicating with readers over UART and with the server via TCP/IP. Debugged and resolved software issues, enhancing system stability. Worked with Git/GitHub for version control and code reviews. Performed performance and memory analysis using Valgrind and gprof. Developed C/C++14 of iConnect-WS, implementing WebSocket-based communication. Contributed to Linux-based (Debian/Ubuntu) development for real-time payment transaction systems. Designed JSON-based messaging protocols and transaction routing logic. Developed a Python proxy server handling concurrent payment requests. Exposed to network concurrency and multithreaded I/O in payment systems. Worked in an international team, collaborating across multiple locations and time zones to deliver secure and efficient payment transaction systems.