Sami Chajii

• Key contributor to the core banking system integration during the Crelan–AXA merger, delivering stable and scalable backend services.

• Designed, developed, and maintained multiple Java REST APIs using Quarkus, applying clean architecture, dependency injection, and reactive programming.

• Implemented microservices for core banking features, including authentication flows, customer data management, and internal orchestration services.

• Built asynchronous processing components using messaging technologies (Kafka).

• Created and optimized batch processing modules in C, supporting data migration and transformation between systems.

• Performed code reviews, contributed to CI/CD improvements, and enforced best practices for clean code and backend performance.

• Collaborated with DevOps and product teams to deploy, monitor, and troubleshoot backend services in production environments.

• Analyzed and translated COBOL applications into C#.

• State-of-the art of VR (virtual reality) technologies in scientific literature.

• Study and analysis of VR technologies (e.g., tracking systems, haptic technologies).

• Software developer (JAVA, Python, C#).

• Embedded Linux on Raspbian and Ubuntu.

• Developed the database for the newly I/O system installed and the communication between clients and server.

• Design of the network distribution of an attraction park.

• Designed and implemented RESTful APIs with Java (Spring Boot) for the new web platform of the company.

• Project executive. Design, implementation and testing of an airflow generator made of amplifiers, speakers and controlled by a Raspberry Pi.

• Stage as Assistant Engineer of 2 months. working on Database (sqlite3 python) on Raspberry and in electronics circuits.

• Contact the sellers and search the electronic components.

• Developed the database for the newly I/O system installed. This is able to recollect the data from the sensors, send it to a central server who will then store the values in the database each hour.

• Developed an GUI in JAVA representing the sensors on the field.

• Design and implement a PCB to have a better connection between the sensors and the µC.