Have you created and configured automatic integration and delivery processes using GitLab CI/CD?

Yes, I have created and configured automated integration and delivery processes (CI/CD) using GitLab CI/CD.

An example of a basic .gitlab-ci.yml for a Java project:

stages:
  - build
  - test
  - deploy

build_job:
  stage: build
  script:
    - ./gradlew build
  artifacts:
    paths:
      - build/libs/

test_job:
  stage: test
  script:
    - ./gradlew test

deploy_job:
  stage: deploy
  script:
    - ./deploy.sh
  only:
    - master

In the process, I configured pipelines for automatic building, running tests, and deploying to testing and production environments. I also integrated code quality checks, notifications, and artifact version management.