Java (Spring Boot, Spring MVC), REST APIsBuilding scalable backend services and APIs Oracle, CockroachDB, SQLData modeling, queries, ORM, and migration GKP (Google Kubernetes Platform), Docker, KubernetesDeploying and managing applications in private cloud Maven, GradleManaging builds and dependencies Jenkins, GitLab CI, GKP DevOpsAutomated build, test, and deployment pipelines JUnit, TestNG, Mockito, Selenium, CypressUnit, integration, and end-to-end testing Swagger/OpenAPIDocumenting and testing REST APIs OAuth2, JWT, Spring SecurityImplementing authentication and authorization ELK Stack, Prometheus, Grafana, SplunkApplication monitoring and log analysis Bash, PythonAutomating tasks and scripts GithubSource code management SonarQube, Checkstyle, ESLintStatic code analysis and quality enforcement JIRA, Confluence, Slack, TeamsAgile project management and team communication