diff --git a/extensions/grpc/codegen/src/main/java/io/quarkus/grpc/deployment/GrpcPostProcessing.java b/extensions/grpc/codegen/src/main/java/io/quarkus/grpc/deployment/GrpcPostProcessing.java
index f6f9dcd2a2491..ca1131b81efaa 100644
--- a/extensions/grpc/codegen/src/main/java/io/quarkus/grpc/deployment/GrpcPostProcessing.java
+++ b/extensions/grpc/codegen/src/main/java/io/quarkus/grpc/deployment/GrpcPostProcessing.java
@@ -1,5 +1,6 @@
 package io.quarkus.grpc.deployment;
 
+import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -9,7 +10,6 @@
 import java.util.Map.Entry;
 import java.util.function.Consumer;
 
-import org.eclipse.microprofile.config.Config;
 import org.jboss.logging.Logger;
 
 import com.github.javaparser.ast.CompilationUnit;
@@ -36,15 +36,37 @@ public class GrpcPostProcessing {
     public static final String STUB = "Stub";
     public static final String BIND_METHOD = "bindService";
 
-    private final CodeGenContext context;
     private final Path root;
+    private final boolean replaceGeneratedAnnotation;
+    private final boolean removeFinal;
 
     public GrpcPostProcessing(CodeGenContext context, Path root) {
-        this.context = context;
         this.root = root;
+        this.replaceGeneratedAnnotation = isEnabled(context, POST_PROCESS_QUARKUS_GENERATED_ANNOTATION, true);
+        this.removeFinal = isEnabled(context, POST_PROCESS_NO_FINAL, true);
     }
 
-    private boolean isEnabled(String name, boolean def) {
+    public GrpcPostProcessing(Path root) {
+        this.root = root;
+        this.replaceGeneratedAnnotation = true;
+        this.removeFinal = true;
+    }
+
+    /**
+     * Methods used for the quarkus-grpc-stub project post-processing (as it's not a quarkus app)
+     *
+     * @param args expects the path to the source root of the files to post-process.
+     */
+    public static void main(String[] args) {
+        for (String arg : args) {
+            Path path = new File(arg).toPath();
+            var postprocessing = new GrpcPostProcessing(path);
+            postprocessing.postprocess();
+        }
+
+    }
+
+    private boolean isEnabled(CodeGenContext context, String name, boolean def) {
         return Boolean.getBoolean(name) || context.config().getOptionalValue(name, Boolean.class).orElse(def);
     }
 
@@ -61,9 +83,9 @@ public com.github.javaparser.utils.SourceRoot.Callback.Result process(Path local
 
                         if (unit.getPrimaryType().isPresent()) {
                             TypeDeclaration<?> type = unit.getPrimaryType().get();
-                            postprocess(unit, type, context.config());
+                            postprocess(unit, type);
 
-                            // save to a tempory file first, then move all temporary unit files at the same time
+                            // save to a temporary file first, then move all temporary unit files at the same time
                             try {
                                 unit.setStorage(Files.createTempFile(null, null),
                                         sr.getParserConfiguration().getCharacterEncoding())
@@ -87,7 +109,7 @@ public com.github.javaparser.utils.SourceRoot.Callback.Result process(Path local
                 }
             });
 
-            changedFiles.entrySet().stream().forEach(new Consumer<Entry<Path, Path>>() {
+            changedFiles.entrySet().forEach(new Consumer<Entry<Path, Path>>() {
                 @Override
                 public void accept(Entry<Path, Path> entry) {
                     try {
@@ -103,26 +125,27 @@ public void accept(Entry<Path, Path> entry) {
             // read issue, report and exit
             log.error("Unable to parse the classes generated using protoc - skipping gRPC post processing", e);
         } finally {
-            changedFiles.entrySet().stream().forEach(new Consumer<Entry<Path, Path>>() {
+            changedFiles.entrySet().forEach(new Consumer<Entry<Path, Path>>() {
                 @Override
                 public void accept(Entry<Path, Path> e) {
                     try {
                         Files.deleteIfExists(e.getKey());
                     } catch (IOException discard) {
+                        // Ignore it.
                     }
                 }
             });
         }
     }
 
-    private void postprocess(CompilationUnit unit, TypeDeclaration<?> primary, Config config) {
+    private void postprocess(CompilationUnit unit, TypeDeclaration<?> primary) {
         log.debugf("Post-processing %s", primary.getFullyQualifiedName().orElse(primary.getNameAsString()));
 
         unit.accept(new ModifierVisitor<Void>() {
 
             @Override
             public Visitable visit(NormalAnnotationExpr n, Void arg) {
-                if (isEnabled(POST_PROCESS_QUARKUS_GENERATED_ANNOTATION, true)) {
+                if (replaceGeneratedAnnotation) {
                     if (n.getNameAsString().equals(JAVAX_GENERATED)) {
                         n.setName(QUARKUS_GENERATED);
                     }
@@ -132,7 +155,7 @@ public Visitable visit(NormalAnnotationExpr n, Void arg) {
 
             @Override
             public Visitable visit(ClassOrInterfaceDeclaration n, Void arg) {
-                if (isEnabled(POST_PROCESS_NO_FINAL, true)) {
+                if (removeFinal) {
                     if (n.hasModifier(Modifier.Keyword.FINAL) && n.getNameAsString().endsWith(STUB)) {
                         n.removeModifier(Modifier.Keyword.FINAL);
                     }
@@ -142,7 +165,7 @@ public Visitable visit(ClassOrInterfaceDeclaration n, Void arg) {
 
             @Override
             public Visitable visit(MethodDeclaration n, Void arg) {
-                if (isEnabled(POST_PROCESS_NO_FINAL, true)) {
+                if (removeFinal) {
                     if (n.hasModifier(Modifier.Keyword.FINAL)
                             && n.getNameAsString().equalsIgnoreCase(BIND_METHOD)) {
                         n.removeModifier(Modifier.Keyword.FINAL);
diff --git a/extensions/grpc/stubs/pom.xml b/extensions/grpc/stubs/pom.xml
index 8e1ec7c3ed1bd..d3a387d227220 100644
--- a/extensions/grpc/stubs/pom.xml
+++ b/extensions/grpc/stubs/pom.xml
@@ -17,6 +17,10 @@
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-grpc-api</artifactId>
         </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-grpc-common</artifactId>
+        </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-grpc-codegen</artifactId>
@@ -82,9 +86,11 @@
                 <artifactId>protobuf-maven-plugin</artifactId>
                 <version>0.6.1</version>
                 <configuration>
-                    <protocArtifact>com.google.protobuf:protoc:${protoc.version}:exe:${os.detected.classifier}</protocArtifact>
+                    <protocArtifact>com.google.protobuf:protoc:${protoc.version}:exe:${os.detected.classifier}
+                    </protocArtifact>
                     <pluginId>grpc-java</pluginId>
-                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}</pluginArtifact>
+                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}
+                    </pluginArtifact>
                     <protocPlugins>
                         <protocPlugin>
                             <id>quarkus-grpc-protoc-plugin</id>
@@ -105,6 +111,27 @@
                     </execution>
                 </executions>
             </plugin>
+
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>post-process</id>
+                        <phase>compile</phase>
+                        <goals>
+                            <goal>java</goal>
+                        </goals>
+                        <configuration>
+                            <includeProjectDependencies>true</includeProjectDependencies>
+                            <arguments>
+                                <argument>${project.build.directory}/generated-sources/protobuf/grpc-java</argument>
+                            </arguments>
+                            <mainClass>io.quarkus.grpc.deployment.GrpcPostProcessing</mainClass>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 </project>
diff --git a/extensions/grpc/stubs/src/main/proto/reflection/v1alpha/reflection.proto b/extensions/grpc/stubs/src/main/proto/reflection/v1alpha/reflection.proto
index 8057ad5598c88..87030dc30d896 100644
--- a/extensions/grpc/stubs/src/main/proto/reflection/v1alpha/reflection.proto
+++ b/extensions/grpc/stubs/src/main/proto/reflection/v1alpha/reflection.proto
@@ -11,7 +11,7 @@ service ServerReflection {
   // The reflection service is structured as a bidirectional stream, ensuring
   // all related requests go to a single server.
   rpc ServerReflectionInfo(stream ServerReflectionRequest)
-  returns (stream ServerReflectionResponse);
+      returns (stream ServerReflectionResponse);
 }
 
 // The message sent by the client when calling ServerReflectionInfo method.