diff --git a/Jenkinsfile b/Jenkinsfile
index fc199b3..ac25a1f 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -6,15 +6,25 @@ pipeline {
     }
 
     stages {
+        stage('Build Backend') {
+            steps {
+                dir('backend') {
+                    sh 'mvn clean package -DskipTests'
+                }
+            }
+        }
+
+        stage('Check target classes') {
+            steps {
+                sh 'ls -la backend/target/classes'
+            }
+        }
+
         stage('Sonar Scan') {
             steps {
                 withSonarQubeEnv('sonarqube') {
                     sh '''
-                        $SCANNER_HOME/bin/sonar-scanner \
-                        -Dsonar.projectKey=test \
-                        -Dsonar.sources=. \
-                        -Dsonar.host.url=$SONAR_HOST_URL \
-                        -Dsonar.token=$SONAR_AUTH_TOKEN
+                        $SCANNER_HOME/bin/sonar-scanner
                     '''
                 }
             }