diff --git a/apps/backend/internal/common/config/config.go b/apps/backend/internal/common/config/config.go
index 19104efaa6..11390e73f9 100644
--- a/apps/backend/internal/common/config/config.go
+++ b/apps/backend/internal/common/config/config.go
@@ -193,6 +193,12 @@ func LoadWithPath(configPath string) (*Config, error) {
 	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
 	v.AutomaticEnv()
 
+	// Explicit bindings for snake_case env vars (camelCase config keys)
+	// AutomaticEnv does not handle camelCase to SNAKE_CASE conversion,
+	// so we explicitly bind keys where env var naming differs from config key naming.
+	_ = v.BindEnv("agent.standalonePort", "KANDEV_AGENT_STANDALONE_PORT")
+	_ = v.BindEnv("agent.standaloneHost", "KANDEV_AGENT_STANDALONE_HOST")
+
 	// Configure config file
 	v.SetConfigName("config")
 	v.SetConfigType("yaml")