messaging platforms , Performance Tuning, Spring Boot, Kafka, API design, Java 8, Microservices, Docker, Terraform, Spring Security, Query Optimization, Tls, Hibernate, Jsp, SSL, Automation, Sql, Mvc, Jpa, Helm, Spring Framework, Struts, Kubernetes, Backend design patterns, DevOps tooling, X-Work, Service orchestration, Secure application practices, REST API design, CI/CD pipelines, Java 21 features