The solution enables teachers to organize online school lessons in an effective and interactive way The online platform created from scratch by our team takes into account all aspects of the learning process and helps to enrich it with new tools and experiences. We aimed to develop a high-load video conference platform with a set of features to simulate real lessons as accurately as possible. It helps teachers to schedule, prepare and conduct lessons, store educational materials, invite pupils from different classes or other people to broadcast. Lessons are taught in real-time through a browser with the help of a video conference, so users may connect via any device – PC, tablet, or smartphone. Lots of functions are provided to make the process more interactive – pupils can raise their hands if they want to answer, paint and type on a virtual blackboard, communicate in chat, and take quizzes created by a teacher on the platform. While engineering the platform, our development team paid special attention to the stability and security of the solution. Thanks to intelligent server distribution, the system handles high loads and can be scaled up automatically without significant effort and cost. Good connection quality and high speed are realized with geographically distributed network architecture. The system is resistant against OWASP TOP 10 vulnerabilities, connections are protected according to TLS and SRTP protocols. Personal data are stored only in encrypted form, and access rights, including access to view personal data, are strictly delimited. The solution has already proved its effective and reliable work for more than 200,000 simultaneous users and is planned to be scaled up soon.Technologies and tools: Java 11, Reactor, Spring Cloud Gateway, Spring Cloud Config, Vault, Spring Data, Spring Security, Lombok, MapStruct, WebFlux, PostgreSQL, Redis
