Fokus utama penelitian ini adalah merancang dan mengembangkan prototipe sistem registrasi IRS berbasisevent-driven architecture serta mengevaluasi sistem tersebut dengan eksperimen chaos engineering.Implementasi sistem menggunakan Spring Boot framework, Apache Kafka sebagai event broker, dan AmazonWeb Service (AWS) untuk infrastruktur. Pengujian dilakukan dengan melakukan API testing untuk mengujifungsionalitas sistem dan load testing untuk menguji reliability sistem. Terakhir, eksperimen chaos engineeringdengan metode chaos monkey dilakukan untuk menguji resilience sistem. Hasil pengujian menunjukkan bahwafungsionalitas sistem sebagai layanan IRS bekerja dengan baik. Sistem dapat tetap bekerja di bawah tekanan40.000 mahasiswa yang disimulasikan mengakses sistem bersamaan. Pada kondisi chaos di mana beberapaserver dimatikan, sistem masih dapat berfungsi dengan baik dan mahasiswa masih dapat menggunakan layananregistrasi IRS tanpa masalah.

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The main focus of this research is to design and develop a prototype of an event-driven architecture based course

registration service, and to evaluate the system with chaos engineering. The system was implemented using

Spring Boot as its framework, Apache Kafka as the event broker, and Amazon Web Service (AWS) for

infrastructure. The testing was done by implementing API testing for evaluating the system’s functionality and

load testing to evaluate system’s reliability. Finally, a chaos engineering experiment was carried out to evaluate

the resilience of the system. The result shows that the system can deliver its functionality as a course plan

registry pretty well. The system was able to work under the pressure of 40.000 student simulated to access the

system simultaneously. In the chaos condition where several server were taken down, the system still performs

well and able to provide the service without any problem for the students.