diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
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+# GitLab CI — dognation 백엔드 (Spring Boot 3 / Gradle / Java 17)
+# dev 브랜치 푸시에서만 실행. 테스트는 인메모리 H2 라 외부 DB 불필요.
+image: eclipse-temurin:17-jdk
+
+variables:
+  GRADLE_USER_HOME: "$CI_PROJECT_DIR/.gradle"
+  GRADLE_OPTS: "-Dorg.gradle.daemon=false"
+
+# Gradle 래퍼/의존성 캐시로 재빌드 가속.
+cache:
+  key: "$CI_COMMIT_REF_SLUG"
+  paths:
+    - .gradle/wrapper
+    - .gradle/caches
+
+stages:
+  - build
+
+build-test:
+  stage: build
+  rules:
+    - if: '$CI_COMMIT_BRANCH == "dev"'
+  before_script:
+    - chmod +x ./gradlew
+  script:
+    # build = compile + test(H2) + assemble(jar)
+    - ./gradlew --no-daemon build
+  artifacts:
+    when: always
+    paths:
+      - build/libs/*.jar
+    reports:
+      junit: build/test-results/test/TEST-*.xml
+    expire_in: 1 week
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