Authentication authorization OAuth IDPs e.g. KeyCloak, Soap, CI CD with Kubernetes or OpenShift, RESTful Microservices, Databases Oracle and PostgreSQL, Monitoring Observability with tools like Grafana ELK Prometheus, Maven and Gradle, JPA ORM Transaction Managers Hibernate, Vulnerability Management with tools like NexusIQ JFrog Xray Artifactory SonarQube, Spring-Boot Cloud, API Management with tools like OpenAPI Swagger and Spectral, Docker Podman Helm