- Design and development of challenge-based training platform (cybersecurity challenges) for training developers on application vulnerabilities and threats in order to meet functional standards such as PCI DSS.- The platform provides practical challenges and tutorials that tracks the vulnerability step by step rather than traditional ways based on courses/slides in order to mirror or mimic real-world scenarios- Tools : Java, Spring ( boot, Security, Cloud...) , Keycloak , PostgreSQL , Liquibase , JUnit , Mockito, Jacoco ,Java Mail, Eureka Server, Spring Cloud Config Server, Docker , docker compose ,Scrum ( jira ) ,Heroku ,Dokku , Git, Gitlab CI/CD, React and JavaScript.