diff --git a/backend/src/config/mod.rs b/backend/src/config/mod.rs
index 8b3db52..46534d0 100644
--- a/backend/src/config/mod.rs
+++ b/backend/src/config/mod.rs
@@ -1,42 +1,57 @@
-use serde::Deserialize;
-
-#[derive(Debug, Clone, Deserialize)]
-pub struct Config {
-    pub database_url: String,
-    pub server_host: String,
-    pub server_port: u16,
-    /// Enable demo mode - restricts destructive actions and enables demo accounts
-    #[serde(default)]
-    pub demo_mode: bool,
-    /// Secret key for JWT tokens
-    #[serde(default = "default_jwt_secret")]
-    pub jwt_secret: String,
-}
-
-fn default_jwt_secret() -> String {
-    "".to_string()
-}
-
-impl Config {
-    pub fn from_env() -> Result<Self, envy::Error> {
-        dotenvy::dotenv().ok();
-        envy::from_env::<Config>()
-    }
-
-    /// Check if demo mode is enabled
-    pub fn is_demo(&self) -> bool {
-        self.demo_mode
-    }
-}
-
-impl Default for Config {
-    fn default() -> Self {
-        Self {
-            database_url: "postgres://likwid:likwid@localhost:5432/likwid".to_string(),
-            server_host: "127.0.0.1".to_string(),
-            server_port: 3000,
-            demo_mode: false,
-            jwt_secret: default_jwt_secret(),
-        }
-    }
-}
+use serde::Deserialize;
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct Config {
+    #[serde(default = "default_database_url")]
+    pub database_url: String,
+    #[serde(default = "default_server_host")]
+    pub server_host: String,
+    #[serde(default = "default_server_port")]
+    pub server_port: u16,
+    /// Enable demo mode - restricts destructive actions and enables demo accounts
+    #[serde(default)]
+    pub demo_mode: bool,
+    /// Secret key for JWT tokens
+    #[serde(default = "default_jwt_secret")]
+    pub jwt_secret: String,
+}
+
+fn default_database_url() -> String {
+    "postgres://likwid:likwid@localhost:5432/likwid".to_string()
+}
+
+fn default_server_host() -> String {
+    "127.0.0.1".to_string()
+}
+
+fn default_server_port() -> u16 {
+    3000
+}
+
+fn default_jwt_secret() -> String {
+    "".to_string()
+}
+
+impl Config {
+    pub fn from_env() -> Result<Self, envy::Error> {
+        dotenvy::dotenv().ok();
+        envy::from_env::<Config>()
+    }
+
+    /// Check if demo mode is enabled
+    pub fn is_demo(&self) -> bool {
+        self.demo_mode
+    }
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            database_url: "postgres://likwid:likwid@localhost:5432/likwid".to_string(),
+            server_host: "127.0.0.1".to_string(),
+            server_port: 3000,
+            demo_mode: false,
+            jwt_secret: default_jwt_secret(),
+        }
+    }
+}
diff --git a/scripts/dev-start.ps1 b/scripts/dev-start.ps1
index 13767c6..454ddf6 100644
--- a/scripts/dev-start.ps1
+++ b/scripts/dev-start.ps1
@@ -23,6 +23,7 @@ New-Item -ItemType Directory -Force -Path $stateDir | Out-Null
 if (-not $env:POSTGRES_USER) { $env:POSTGRES_USER = 'likwid' }
 if (-not $env:POSTGRES_PASSWORD) { $env:POSTGRES_PASSWORD = 'likwid' }
 if (-not $env:POSTGRES_DB) { $env:POSTGRES_DB = 'likwid' }
+if (-not $env:JWT_SECRET) { $env:JWT_SECRET = 'dev_jwt_secret_not_for_production' }
 $env:DATABASE_URL = "postgres://$($env:POSTGRES_USER):$($env:POSTGRES_PASSWORD)@127.0.0.1:5432/$($env:POSTGRES_DB)"
 
 # Check if already running