diff --git a/src/components/settings/AccountProfileTab.tsx b/src/components/settings/AccountProfileTab.tsx
index cc2b221e..43c0bc18 100644
--- a/src/components/settings/AccountProfileTab.tsx
+++ b/src/components/settings/AccountProfileTab.tsx
@@ -16,6 +16,7 @@ import { useAuth } from '@/hooks/useAuth';
 import { supabase } from '@/integrations/supabase/client';
 import { User, Upload, Trash2 } from 'lucide-react';
 import { PhotoUpload } from '@/components/upload/PhotoUpload';
+import { notificationService } from '@/lib/notificationService';
 
 const profileSchema = z.object({
   username: z.string().min(3).max(30).regex(/^[a-zA-Z0-9_-]+$/),
@@ -54,6 +55,8 @@ export function AccountProfileTab() {
     
     setLoading(true);
     try {
+      const usernameChanged = profile?.username !== data.username;
+      
       const { error } = await supabase
         .from('profiles')
         .update({
@@ -69,6 +72,15 @@ export function AccountProfileTab() {
 
       if (error) throw error;
 
+      // Update Novu subscriber if username changed
+      if (usernameChanged && notificationService.isEnabled()) {
+        await notificationService.updateSubscriber({
+          subscriberId: user.id,
+          email: user.email,
+          firstName: data.username, // Send username as firstName to Novu
+        });
+      }
+
       await refreshProfile();
       toast({
         title: 'Profile updated',
diff --git a/src/components/settings/NotificationsTab.tsx b/src/components/settings/NotificationsTab.tsx
index 266db976..c9eb2cc1 100644
--- a/src/components/settings/NotificationsTab.tsx
+++ b/src/components/settings/NotificationsTab.tsx
@@ -111,6 +111,14 @@ export function NotificationsTab() {
 
       if (result.success) {
         toast.success("Notification preferences saved successfully");
+        
+        // Also update Novu subscriber profile to sync channel preferences
+        if (notificationService.isEnabled()) {
+          await notificationService.updateSubscriber({
+            subscriberId: user.id,
+            email: user.email,
+          });
+        }
       } else {
         throw new Error(result.error || 'Failed to save preferences');
       }
diff --git a/src/lib/notificationService.ts b/src/lib/notificationService.ts
index e34a1e71..6cdbeebc 100644
--- a/src/lib/notificationService.ts
+++ b/src/lib/notificationService.ts
@@ -71,6 +71,30 @@ class NotificationService {
     }
   }
 
+  /**
+   * Update an existing Novu subscriber's profile information
+   */
+  async updateSubscriber(subscriberData: SubscriberData): Promise<{ success: boolean; error?: string }> {
+    if (!this.isNovuEnabled) {
+      console.warn('Novu is not configured. Skipping subscriber update.');
+      return { success: false, error: 'Novu not configured' };
+    }
+
+    try {
+      const { data, error } = await supabase.functions.invoke('update-novu-subscriber', {
+        body: subscriberData,
+      });
+
+      if (error) throw error;
+
+      console.log('Novu subscriber updated successfully');
+      return { success: true };
+    } catch (error: any) {
+      console.error('Error updating Novu subscriber:', error);
+      return { success: false, error: error.message };
+    }
+  }
+
   /**
    * Update subscriber preferences in Novu
    */
diff --git a/src/pages/Auth.tsx b/src/pages/Auth.tsx
index 1f1e51e5..f19c5368 100644
--- a/src/pages/Auth.tsx
+++ b/src/pages/Auth.tsx
@@ -147,7 +147,7 @@ export default function Auth() {
         notificationService.createSubscriber({
           subscriberId: data.user.id,
           email: formData.email,
-          firstName: formData.displayName || formData.username,
+          firstName: formData.username, // Send username as firstName to Novu
           data: {
             username: formData.username,
           }
diff --git a/supabase/functions/create-novu-subscriber/index.ts b/supabase/functions/create-novu-subscriber/index.ts
index 20e08504..f53a5996 100644
--- a/supabase/functions/create-novu-subscriber/index.ts
+++ b/supabase/functions/create-novu-subscriber/index.ts
@@ -24,7 +24,7 @@ serve(async (req) => {
 
     const { subscriberId, email, firstName, lastName, phone, avatar, data } = await req.json();
 
-    console.log('Creating Novu subscriber:', { subscriberId, email });
+    console.log('Creating Novu subscriber:', { subscriberId, email, firstName });
 
     const subscriber = await novu.subscribers.identify(subscriberId, {
       email,
diff --git a/supabase/functions/update-novu-subscriber/index.ts b/supabase/functions/update-novu-subscriber/index.ts
new file mode 100644
index 00000000..d138b1e8
--- /dev/null
+++ b/supabase/functions/update-novu-subscriber/index.ts
@@ -0,0 +1,64 @@
+import { serve } from "https://deno.land/std@0.168.0/http/server.ts";
+import { Novu } from "npm:@novu/node@2.0.2";
+
+const corsHeaders = {
+  'Access-Control-Allow-Origin': '*',
+  'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type',
+};
+
+serve(async (req) => {
+  if (req.method === 'OPTIONS') {
+    return new Response(null, { headers: corsHeaders });
+  }
+
+  try {
+    const novuApiKey = Deno.env.get('NOVU_API_KEY');
+    
+    if (!novuApiKey) {
+      throw new Error('NOVU_API_KEY is not configured');
+    }
+
+    const novu = new Novu(novuApiKey, {
+      backendUrl: Deno.env.get('VITE_NOVU_API_URL') || 'https://api.novu.co',
+    });
+
+    const { subscriberId, email, firstName, lastName, phone, avatar, data } = await req.json();
+
+    console.log('Updating Novu subscriber:', { subscriberId, email, firstName });
+
+    const subscriber = await novu.subscribers.update(subscriberId, {
+      email,
+      firstName,
+      lastName,
+      phone,
+      avatar,
+      data,
+    });
+
+    console.log('Subscriber updated successfully:', subscriber.data);
+
+    return new Response(
+      JSON.stringify({
+        success: true,
+        subscriberId: subscriber.data._id,
+      }),
+      {
+        headers: { ...corsHeaders, 'Content-Type': 'application/json' },
+        status: 200,
+      }
+    );
+  } catch (error: any) {
+    console.error('Error updating Novu subscriber:', error);
+    
+    return new Response(
+      JSON.stringify({
+        success: false,
+        error: error.message,
+      }),
+      {
+        headers: { ...corsHeaders, 'Content-Type': 'application/json' },
+        status: 500,
+      }
+    );
+  }
+});