WebSphere Liberty
WebSphere Liberty is a lightweight, modular, and fast Java application server from IBM, designed for modern cloud-native and microservices architectures. It provides a runtime environment for Java EE (now Jakarta EE) and MicroProfile applications, with dynamic configuration and rapid startup times. Liberty is often used in containerized deployments and DevOps pipelines due to its small footprint and flexibility.
Developers should learn WebSphere Liberty when building enterprise Java applications that require a scalable, cloud-ready server with support for Jakarta EE and MicroProfile standards. It is ideal for microservices, containerized environments like Docker and Kubernetes, and scenarios where fast deployment and low resource consumption are critical, such as in CI/CD workflows or hybrid cloud setups.