Micronaut
Micronaut is a modern, JVM-based, full-stack framework for building modular, easily testable microservice and serverless applications. It uses ahead-of-time (AOT) compilation to reduce startup time and memory footprint, making it ideal for cloud-native environments. The framework provides dependency injection, configuration management, and HTTP client/server capabilities out of the box.
Developers should learn Micronaut when building high-performance, low-latency microservices or serverless functions in Java, Kotlin, or Groovy, especially for cloud deployments where fast startup and minimal resource usage are critical. It's particularly useful in scenarios like IoT, real-time data processing, or scalable backend services due to its efficient AOT compilation and built-in support for reactive programming.