diff --git a/.github/kustomize/base/kustomization.yaml b/.github/kustomize/base/kustomization.yaml
index 9a34038..86fb5de 100644
--- a/.github/kustomize/base/kustomization.yaml
+++ b/.github/kustomize/base/kustomization.yaml
@@ -6,7 +6,6 @@ metadata:
 
 resources:
   # Common resources
-  - namespace.yaml
   - common/ingress.yaml
   - common/cm-common.yaml
   - common/secret-common.yaml
diff --git a/.github/kustomize/base/namespace.yaml b/.github/kustomize/base/namespace.yaml
deleted file mode 100644
index e0edb58..0000000
--- a/.github/kustomize/base/namespace.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
-apiVersion: v1
-kind: Namespace
-metadata:
-  name: phonebill
-  labels:
-    name: phonebill
\ No newline at end of file
diff --git a/.github/workflows/backend-cicd_ArgoCD.yaml b/.github/workflows/backend-cicd_ArgoCD.yaml
index 086cb0f..8dcf1d0 100644
--- a/.github/workflows/backend-cicd_ArgoCD.yaml
+++ b/.github/workflows/backend-cicd_ArgoCD.yaml
@@ -1,13 +1,36 @@
-name: Backend CI/CD Pipeline
-
+name: Backend Services CI/CD (ArgoCD)
 on:
   push:
-    branches:
-      - main
-      - develop
+    branches: [ main, develop ]
+    paths:
+      - 'api-gateway/**'
+      - 'user-service/**'
+      - 'bill-service/**'
+      - 'product-service/**'
+      - 'kos-mock/**'
+      - 'common/**'
+      - '.github/**'
   pull_request:
-    branches:
-      - main
+    branches: [ main ]
+  workflow_dispatch:
+    inputs:
+      ENVIRONMENT:
+        description: 'Target environment'
+        required: true
+        default: 'dev'
+        type: choice
+        options:
+          - dev
+          - staging
+          - prod
+      SKIP_SONARQUBE:
+        description: 'Skip SonarQube Analysis'
+        required: false
+        default: 'true'
+        type: choice
+        options:
+          - 'true'
+          - 'false'
 
 env:
   REGISTRY: acrdigitalgarage01.azurecr.io
@@ -20,132 +43,170 @@ jobs:
     name: Build and Test
     runs-on: ubuntu-latest
     outputs:
-      image_tag: ${{ steps.set_env.outputs.image_tag }}
-      environment: ${{ steps.set_env.outputs.environment }}
+      image_tag: ${{ steps.set_outputs.outputs.image_tag }}
+      environment: ${{ steps.set_outputs.outputs.environment }}
+
     steps:
       - name: Check out code
         uses: actions/checkout@v4
 
-      - name: Set Environment
-        id: set_env
-        run: |
-          if [[ "${{ github.ref }}" == "refs/heads/main" ]]; then
-            echo "environment=prod" >> $GITHUB_OUTPUT
-          elif [[ "${{ github.ref }}" == "refs/heads/develop" ]]; then
-            echo "environment=staging" >> $GITHUB_OUTPUT
-          else
-            echo "environment=dev" >> $GITHUB_OUTPUT
-          fi
-
-          IMAGE_TAG=$(date '+%Y%m%d%H%M%S')
-          echo "image_tag=$IMAGE_TAG" >> $GITHUB_OUTPUT
-
-      - name: Setup JDK 21
-        uses: actions/setup-java@v4
+      - name: Set up JDK 21
+        uses: actions/setup-java@v3
         with:
           java-version: '21'
           distribution: 'temurin'
+          cache: 'gradle'
 
-      - name: Cache Gradle packages
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.gradle/caches
-            ~/.gradle/wrapper
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
-          restore-keys: |
-            ${{ runner.os }}-gradle-
+      - name: Determine environment
+        id: determine_env
+        run: |
+          # Use input parameter or default to 'dev'
+          ENVIRONMENT="${{ github.event.inputs.ENVIRONMENT || 'dev' }}"
+          echo "environment=$ENVIRONMENT" >> $GITHUB_OUTPUT
+
+      - name: Load environment variables
+        id: env_vars
+        run: |
+          ENV=${{ steps.determine_env.outputs.environment }}
+
+          # Initialize variables with defaults
+          REGISTRY="acrdigitalgarage01.azurecr.io"
+          IMAGE_ORG="phonebill"
+          RESOURCE_GROUP="rg-digitalgarage-01"
+          AKS_CLUSTER="aks-digitalgarage-01"
+
+          # Read environment variables from .github/config file
+          if [[ -f ".github/config/deploy_env_vars_${ENV}" ]]; then
+            while IFS= read -r line || [[ -n "$line" ]]; do
+              # Skip comments and empty lines
+              [[ "$line" =~ ^#.*$ ]] && continue
+              [[ -z "$line" ]] && continue
+
+              # Extract key-value pairs
+              key=$(echo "$line" | cut -d '=' -f1)
+              value=$(echo "$line" | cut -d '=' -f2-)
+
+              # Override defaults if found in config
+              case "$key" in
+                "resource_group") RESOURCE_GROUP="$value" ;;
+                "cluster_name") AKS_CLUSTER="$value" ;;
+              esac
+            done < ".github/config/deploy_env_vars_${ENV}"
+          fi
+
+          # Export for other jobs
+          echo "REGISTRY=$REGISTRY" >> $GITHUB_ENV
+          echo "IMAGE_ORG=$IMAGE_ORG" >> $GITHUB_ENV
+          echo "RESOURCE_GROUP=$RESOURCE_GROUP" >> $GITHUB_ENV
+          echo "AKS_CLUSTER=$AKS_CLUSTER" >> $GITHUB_ENV
 
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew
 
       - name: Build with Gradle
-        run: ./gradlew build -x test
+        run: |
+          ./gradlew build -x test
 
-      - name: Run tests
-        run: ./gradlew test
-
-      - name: Generate test report
-        run: ./gradlew jacocoTestReport
-
-      - name: SonarQube Scan
-        if: github.event_name != 'pull_request'
+      - name: SonarQube Analysis & Quality Gate
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
         run: |
-          services=("api-gateway" "user-service" "bill-service" "product-service" "kos-mock")
+          # Check if SonarQube should be skipped
+          SKIP_SONARQUBE="${{ github.event.inputs.SKIP_SONARQUBE || 'true' }}"
+
+          if [[ "$SKIP_SONARQUBE" == "true" ]]; then
+            echo "⏭️ Skipping SonarQube Analysis (SKIP_SONARQUBE=$SKIP_SONARQUBE)"
+            exit 0
+          fi
+
+          # Define services array
+          services=(api-gateway user-service bill-service product-service kos-mock)
+
+          # Run tests, coverage reports, and SonarQube analysis for each service
           for service in "${services[@]}"; do
-            ./gradlew :${service}:sonar \
-              -Dsonar.projectKey=phonebill-${service}-${{ steps.set_env.outputs.environment }} \
-              -Dsonar.projectName=phonebill-${service}-${{ steps.set_env.outputs.environment }} \
+            ./gradlew :$service:test :$service:jacocoTestReport :$service:sonar \
+              -Dsonar.projectKey=phonebill-$service-${{ steps.determine_env.outputs.environment }} \
+              -Dsonar.projectName=phonebill-$service-${{ steps.determine_env.outputs.environment }} \
+              -Dsonar.host.url=$SONAR_HOST_URL \
+              -Dsonar.token=$SONAR_TOKEN \
               -Dsonar.java.binaries=build/classes/java/main \
               -Dsonar.coverage.jacoco.xmlReportPaths=build/reports/jacoco/test/jacocoTestReport.xml \
               -Dsonar.exclusions=**/config/**,**/entity/**,**/dto/**,**/*Application.class,**/exception/**
           done
 
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-builds
+          path: |
+            api-gateway/build/libs/*.jar
+            user-service/build/libs/*.jar
+            bill-service/build/libs/*.jar
+            product-service/build/libs/*.jar
+            kos-mock/build/libs/*.jar
+
+      - name: Set outputs
+        id: set_outputs
+        run: |
+          # Generate timestamp for image tag
+          IMAGE_TAG=$(date +%Y%m%d%H%M%S)
+          echo "image_tag=$IMAGE_TAG" >> $GITHUB_OUTPUT
+          echo "environment=${{ steps.determine_env.outputs.environment }}" >> $GITHUB_OUTPUT
+
   release:
-    name: Build and Push Images
+    name: Build and Push Docker Images
     needs: build
     runs-on: ubuntu-latest
-    if: github.event_name == 'push'
+
     steps:
       - name: Check out code
         uses: actions/checkout@v4
 
-      - name: Set image tag environment variable
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: app-builds
+
+      - name: Set environment variables from build job
         run: |
-          echo "IMAGE_TAG=${{ needs.build.outputs.image_tag }}" >> $GITHUB_ENV
+          echo "REGISTRY=${{ env.REGISTRY }}" >> $GITHUB_ENV
+          echo "IMAGE_ORG=${{ env.IMAGE_ORG }}" >> $GITHUB_ENV
           echo "ENVIRONMENT=${{ needs.build.outputs.environment }}" >> $GITHUB_ENV
-
-      - name: Setup JDK 21
-        uses: actions/setup-java@v4
-        with:
-          java-version: '21'
-          distribution: 'temurin'
-
-      - name: Cache Gradle packages
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.gradle/caches
-            ~/.gradle/wrapper
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
-          restore-keys: |
-            ${{ runner.os }}-gradle-
-
-      - name: Grant execute permission for gradlew
-        run: chmod +x gradlew
-
-      - name: Build with Gradle
-        run: ./gradlew build -x test
+          echo "IMAGE_TAG=${{ needs.build.outputs.image_tag }}" >> $GITHUB_ENV
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Log in to Azure Container Registry
+      - name: Login to Docker Hub (prevent rate limit)
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+      - name: Login to Azure Container Registry
         uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ secrets.ACR_USERNAME }}
           password: ${{ secrets.ACR_PASSWORD }}
 
-      - name: Build and push images
+      - name: Build and push Docker images for all services
         run: |
-          services=("api-gateway" "user-service" "bill-service" "product-service" "kos-mock")
+          # Define services array
+          services=(api-gateway user-service bill-service product-service kos-mock)
 
+          # Build and push each service image
           for service in "${services[@]}"; do
             echo "Building and pushing $service..."
-
             docker build \
-              --build-arg BUILD_LIB_DIR="${service}/build/libs" \
-              --build-arg ARTIFACTORY_FILE="${service}.jar" \
+              --build-arg BUILD_LIB_DIR="$service/build/libs" \
+              --build-arg ARTIFACTORY_FILE="$service.jar" \
               -f deployment/container/Dockerfile-backend \
-              -t ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/${service}:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }} .
+              -t ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/$service:${{ needs.build.outputs.environment }}-${{ needs.build.outputs.image_tag }} .
 
-            docker push ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/${service}:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}
-
-            echo "✅ Successfully built and pushed ${service}:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}"
+            docker push ${{ env.REGISTRY }}/${{ env.IMAGE_ORG }}/$service:${{ needs.build.outputs.environment }}-${{ needs.build.outputs.image_tag }}
           done
 
   update-manifest:
@@ -154,37 +215,37 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - name: Set image tag environment variable
-      run: |
-        echo "IMAGE_TAG=${{ needs.build.outputs.image_tag }}" >> $GITHUB_ENV
-        echo "ENVIRONMENT=${{ needs.build.outputs.environment }}" >> $GITHUB_ENV
+      - name: Set image tag environment variable
+        run: |
+          echo "IMAGE_TAG=${{ needs.build.outputs.image_tag }}" >> $GITHUB_ENV
+          echo "ENVIRONMENT=${{ needs.build.outputs.environment }}" >> $GITHUB_ENV
 
-    - name: Update Manifest Repository
-      run: |
-        # 매니페스트 레포지토리 클론
-        REPO_URL=$(echo "https://github.com/cna-bootcamp/phonebill-manifest.git" | sed 's|https://||')
-        git clone https://${{ secrets.GIT_USERNAME }}:${{ secrets.GIT_PASSWORD }}@${REPO_URL} manifest-repo
-        cd manifest-repo
+      - name: Update Manifest Repository
+        run: |
+          # 매니페스트 레포지토리 클론
+          REPO_URL=$(echo "https://github.com/cna-bootcamp/phonebill-manifest.git" | sed 's|https://||')
+          git clone https://${{ secrets.GIT_USERNAME }}:${{ secrets.GIT_PASSWORD }}@${REPO_URL} manifest-repo
+          cd manifest-repo
 
-        # Kustomize 설치
-        curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash
-        sudo mv kustomize /usr/local/bin/
+          # Kustomize 설치
+          curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh" | bash
+          sudo mv kustomize /usr/local/bin/
 
-        # 매니페스트 업데이트
-        cd phonebill/kustomize/overlays/${{ env.ENVIRONMENT }}
+          # 매니페스트 업데이트
+          cd phonebill/kustomize/overlays/${{ env.ENVIRONMENT }}
 
-        # 각 서비스별 이미지 태그 업데이트
-        services="api-gateway user-service bill-service product-service kos-mock"
-        for service in $services; do
-          kustomize edit set image acrdigitalgarage01.azurecr.io/phonebill/$service:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}
-        done
+          # 각 서비스별 이미지 태그 업데이트
+          services="api-gateway user-service bill-service product-service kos-mock"
+          for service in $services; do
+            kustomize edit set image acrdigitalgarage01.azurecr.io/phonebill/$service:${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}
+          done
 
-        # Git 설정 및 푸시
-        cd ../../../..
-        git config user.name "GitHub Actions"
-        git config user.email "actions@github.com"
-        git add .
-        git commit -m "🚀 Update phonebill ${{ env.ENVIRONMENT }} images to ${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}"
-        git push origin main
+          # Git 설정 및 푸시
+          cd ../../../..
+          git config user.name "GitHub Actions"
+          git config user.email "actions@github.com"
+          git add .
+          git commit -m "🚀 Update phonebill ${{ env.ENVIRONMENT }} images to ${{ env.ENVIRONMENT }}-${{ env.IMAGE_TAG }}"
+          git push origin main
 
-        echo "✅ 매니페스트 업데이트 완료. ArgoCD가 자동으로 배포합니다."
\ No newline at end of file
+          echo "✅ 매니페스트 업데이트 완료. ArgoCD가 자동으로 배포합니다."
\ No newline at end of file
diff --git a/deployment/cicd/Jenkinsfile_ArgoCD b/deployment/cicd/Jenkinsfile_ArgoCD
index 204f7bb..80cab0f 100644
--- a/deployment/cicd/Jenkinsfile_ArgoCD
+++ b/deployment/cicd/Jenkinsfile_ArgoCD
@@ -25,10 +25,10 @@ podTemplate(
     ''',
     containers: [
         containerTemplate(
-            name: 'podman', 
-            image: "mgoltzsche/podman", 
-            ttyEnabled: true, 
-            command: 'cat', 
+            name: 'podman',
+            image: "mgoltzsche/podman",
+            ttyEnabled: true,
+            command: 'cat',
             privileged: true,
             resourceRequestCpu: '500m',
             resourceRequestMemory: '2Gi',
@@ -51,14 +51,24 @@ podTemplate(
             ]
         ),
         containerTemplate(
-            name: 'azure-cli', 
-            image: 'hiondal/azure-kubectl:latest', 
-            command: 'cat', 
+            name: 'azure-cli',
+            image: 'hiondal/azure-kubectl:latest',
+            command: 'cat',
             ttyEnabled: true,
             resourceRequestCpu: '200m',
             resourceRequestMemory: '512Mi',
             resourceLimitCpu: '500m',
             resourceLimitMemory: '1Gi'
+        ),
+        containerTemplate(
+            name: 'git',
+            image: 'alpine/git:latest',
+            command: 'cat',
+            ttyEnabled: true,
+            resourceRequestCpu: '100m',
+            resourceRequestMemory: '256Mi',
+            resourceLimitCpu: '300m',
+            resourceLimitMemory: '512Mi'
         )
     ],
     volumes: [
@@ -73,25 +83,13 @@ podTemplate(
         def environment = params.ENVIRONMENT ?: 'dev'
         def skipSonarQube = (params.SKIP_SONARQUBE?.toLowerCase() == 'true')
         def services = ['api-gateway', 'user-service', 'bill-service', 'product-service', 'kos-mock']
-        
+
         try {
             stage("Get Source") {
                 checkout scm
                 props = readProperties file: "deployment/cicd/config/deploy_env_vars_${environment}"
             }
 
-            stage("Setup AKS") {
-                container('azure-cli') {
-                    withCredentials([azureServicePrincipal('azure-credentials')]) {
-                        sh """
-                            az login --service-principal -u \$AZURE_CLIENT_ID -p \$AZURE_CLIENT_SECRET -t \$AZURE_TENANT_ID
-                            az aks get-credentials --resource-group ${props.resource_group} --name ${props.cluster_name} --overwrite-existing
-                            kubectl create namespace phonebill-${environment} --dry-run=client -o yaml | kubectl apply -f -
-                        """
-                    }
-                }
-            }
-
             stage('Build') {
                 container('gradle') {
                     sh """
@@ -118,7 +116,7 @@ podTemplate(
                                         -Dsonar.exclusions=**/config/**,**/entity/**,**/dto/**,**/*Application.class,**/exception/**
                                 """
                             }
-                            
+
                             // Quality Gate 확인
                             timeout(time: 10, unit: 'MINUTES') {
                                 def qg = waitForQualityGate()
@@ -142,13 +140,13 @@ podTemplate(
                             ),
                             usernamePassword(
                                 credentialsId: 'dockerhub-credentials',
-                                usernameVariable: 'DOCKERHUB_USERNAME', 
+                                usernameVariable: 'DOCKERHUB_USERNAME',
                                 passwordVariable: 'DOCKERHUB_PASSWORD'
                             )
                         ]) {
                             // Docker Hub 로그인 (rate limit 해결)
                             sh "podman login docker.io --username \$DOCKERHUB_USERNAME --password \$DOCKERHUB_PASSWORD"
-                            
+
                             // ACR 로그인
                             sh "podman login acrdigitalgarage01.azurecr.io --username \$ACR_USERNAME --password \$ACR_PASSWORD"
 
@@ -169,7 +167,7 @@ podTemplate(
             }
 
             stage('Update Manifest Repository') {
-                container('azure-cli') {
+                container('git') {
                     withCredentials([usernamePassword(
                         credentialsId: 'github-credentials-dg0500',
                         usernameVariable: 'GIT_USERNAME',
@@ -208,19 +206,20 @@ podTemplate(
                     }
                 }
             }
-        
+
             // 파이프라인 완료 로그 (Scripted Pipeline 방식)
             stage('Pipeline Complete') {
                 echo "🧹 Pipeline completed. Pod cleanup handled by Jenkins Kubernetes Plugin."
-                
+
                 // 성공/실패 여부 로깅
                 if (currentBuild.result == null || currentBuild.result == 'SUCCESS') {
                     echo "✅ Pipeline completed successfully!"
+                    echo "✅ 매니페스트가 업데이트되었습니다. ArgoCD에서 배포를 확인하세요."
                 } else {
                     echo "❌ Pipeline failed with result: ${currentBuild.result}"
                 }
             }
-            
+
         } catch (Exception e) {
             currentBuild.result = 'FAILURE'
             echo "❌ Pipeline failed with exception: ${e.getMessage()}"
diff --git a/deployment/cicd/kustomize/base/kustomization.yaml b/deployment/cicd/kustomize/base/kustomization.yaml
index e6ec7ef..e4c3872 100644
--- a/deployment/cicd/kustomize/base/kustomization.yaml
+++ b/deployment/cicd/kustomize/base/kustomization.yaml
@@ -5,9 +5,7 @@ metadata:
   name: phonebill-base
 
 resources:
-  # Namespace
-  - namespace.yaml
-  
+
   # Common resources
   - common/cm-common.yaml
   - common/secret-common.yaml
diff --git a/deployment/cicd/kustomize/base/namespace.yaml b/deployment/cicd/kustomize/base/namespace.yaml
deleted file mode 100644
index 3900a62..0000000
--- a/deployment/cicd/kustomize/base/namespace.yaml
+++ /dev/null
@@ -1,4 +0,0 @@
-apiVersion: v1
-kind: Namespace
-metadata:
-  name: placeholder
\ No newline at end of file