diff --git a/src/Service/DeployService.php b/src/Service/DeployService.php
new file mode 100644
index 0000000..f53b5ad
--- /dev/null
+++ b/src/Service/DeployService.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\Environment;
+use Symfony\Component\Process\Process;
+
+final class DeployService
+{
+    /**
+     * @return array{success: bool, output: string, exitCode: int}
+     */
+    public function deploy(Environment $environment, string $tag): array
+    {
+        $scriptPath = $environment->getDeployScriptPath();
+
+        if (null === $scriptPath || !file_exists($scriptPath)) {
+            return [
+                'success' => false,
+                'output' => sprintf('Deploy script not found: %s', $scriptPath ?? 'null'),
+                'exitCode' => 1,
+            ];
+        }
+
+        $process = new Process(
+            ['bash', $scriptPath, $tag],
+            dirname($scriptPath),
+        );
+        $process->setTimeout(300);
+
+        $process->run();
+
+        return [
+            'success' => $process->isSuccessful(),
+            'output' => $process->getOutput() . $process->getErrorOutput(),
+            'exitCode' => $process->getExitCode() ?? 1,
+        ];
+    }
+}