diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..3c0c1077
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,36 @@
+name: CI
+
+on:
+  push:
+    branches: [ "**" ]
+  pull_request:
+    branches: [ "**" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        java: [ 8, 11, 17 ]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: ${{ matrix.java }}
+          cache: maven
+
+      - name: Build & Test (UTF-8 / Asia/Seoul)
+        run: mvn -B -U -q -Dfile.encoding=UTF-8 -Duser.timezone=Asia/Seoul test
+
+      - name: Upload surefire reports on failure
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: surefire-reports-java-${{ matrix.java }}
+          path: '**/target/surefire-reports/'
+          if-no-files-found: ignore
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