diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..9c3f8b0
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,36 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 25
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+
+      - name: Set up Gradle (with build cache)
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Build + run all tests
+        run: ./gradlew --no-daemon build
+
+      - name: Upload test reports on failure
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-reports
+          path: |
+            **/build/reports/tests/
+            **/build/test-results/
+          retention-days: 7
diff --git a/README.md b/README.md
index 00eb60b..c903cef 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # OpenRemit
 
+[![CI](https://github.com/NewEgoDoc/OpenRemit/actions/workflows/ci.yml/badge.svg)](https://github.com/NewEgoDoc/OpenRemit/actions/workflows/ci.yml)
+
 송금 + 내부 결제 게이트웨이 백엔드.
 
 ## 실행
@@ -23,3 +25,12 @@ docker compose up -d
 ## 스택
 
 Kotlin 2.2 / Spring Boot 4.0 / Java 21 · MySQL 8 + Flyway · Redis · Kafka · Resilience4j · Testcontainers + Kotest
+
+## 테스트
+
+```bash
+./gradlew build
+```
+
+통합 테스트는 Testcontainers로 MySQL 8 + Redis 7을 자동 기동합니다 (Docker 필요).
+GitHub Actions CI에서도 동일한 Testcontainers 기반으로 매 커밋 검증.