diff --git a/src/app/api/user/profile/route.ts b/src/app/api/user/profile/route.ts
new file mode 100644
index 00000000..89899725
--- /dev/null
+++ b/src/app/api/user/profile/route.ts
@@ -0,0 +1,56 @@
+import { NextResponse } from 'next/server';
+import { z } from 'zod';
+import { withRateLimit } from '@/lib/ratelimit';
+import { edgeLog } from '@/../infra/edge-config';
+
+export const runtime = 'edge';
+
+const profileBodySchema = z.object({
+  firstName: z.string().min(1, 'First name is required').max(100),
+  lastName: z.string().min(1, 'Last name is required').max(100),
+  email: z.string().email('Invalid email address'),
+  bio: z.string().max(500, 'Bio must be at most 500 characters'),
+  location: z.string().max(200).optional(),
+  website: z.string().url('Invalid URL').max(500).optional().or(z.literal('')),
+  twitter: z.string().max(100).optional(),
+  github: z.string().max(100).optional(),
+  linkedin: z.string().max(100).optional(),
+});
+
+export async function PUT(request: Request) {
+  edgeLog('info', '/api/user/profile', 'PUT request received');
+  const { addHeaders, rateLimitResponse } = withRateLimit(request, 'WRITE');
+  if (rateLimitResponse) return rateLimitResponse;
+
+  try {
+    const json = await request.json();
+    const parsed = profileBodySchema.safeParse(json);
+
+    if (!parsed.success) {
+      const fieldErrors = parsed.error.errors.map((e) => ({
+        field: e.path.join('.'),
+        message: e.message,
+      }));
+      return addHeaders(
+        NextResponse.json(
+          { success: false, message: 'Validation failed', errors: fieldErrors },
+          { status: 400 },
+        ),
+      );
+    }
+
+    return addHeaders(
+      NextResponse.json({
+        success: true,
+        data: {
+          ...parsed.data,
+          updatedAt: new Date().toISOString(),
+        },
+      }),
+    );
+  } catch {
+    return addHeaders(
+      NextResponse.json({ success: false, message: 'Bad request body' }, { status: 400 }),
+    );
+  }
+}
diff --git a/src/app/components/profile/ProfileEditForm.tsx b/src/app/components/profile/ProfileEditForm.tsx
index ff1b2c47..34d7f67c 100644
--- a/src/app/components/profile/ProfileEditForm.tsx
+++ b/src/app/components/profile/ProfileEditForm.tsx
@@ -9,6 +9,7 @@ import ImageUploader from '@/components/shared/ImageUploader';
 import PreferencesSection from '@/components/profile/PreferencesSection';
 import { useProfileUpdate } from '@/app/hooks/useProfileUpdate';
 import { FieldError } from '@/components/forms/FormError';
+import { ApiError } from '@/utils/error-handler';
 
 const profileSchema = z.object({
   firstName: z.string().min(2, 'First name must be at least 2 characters'),
@@ -42,6 +43,7 @@ export default function ProfileEditForm() {
   const {
     register,
     handleSubmit,
+    setError,
     formState: { errors },
   } = useForm<ProfileFormData>({
     resolver: zodResolver(profileSchema),
@@ -53,11 +55,18 @@ export default function ProfileEditForm() {
       try {
         await updateProfile(data);
         toast.success('Profile updated successfully!');
-      } catch {
-        toast.error('Failed to update profile. Please try again.');
+      } catch (error: unknown) {
+        if (error instanceof ApiError && error.errors) {
+          for (const fe of error.errors) {
+            setError(fe.field as keyof ProfileFormData, { message: fe.message });
+          }
+          toast.error('Please fix the highlighted fields.');
+        } else {
+          toast.error('Failed to update profile. Please try again.');
+        }
       }
     },
-    [updateProfile],
+    [updateProfile, setError],
   );
 
   const handleImageSelect = useCallback(() => {}, []);
diff --git a/src/app/hooks/useProfileUpdate.ts b/src/app/hooks/useProfileUpdate.ts
index 625d7793..91c60511 100644
--- a/src/app/hooks/useProfileUpdate.ts
+++ b/src/app/hooks/useProfileUpdate.ts
@@ -1,4 +1,5 @@
 import { useCallback, useMemo, useState } from 'react';
+import { apiClient } from '@/lib/api';
 import { createLogger } from '@/lib/logging';
 const logger = createLogger('useProfileUpdate');
 
@@ -14,30 +15,32 @@ interface ProfileData {
   linkedin?: string;
 }
 
+interface ProfileUpdateResponse {
+  success: boolean;
+  data: ProfileData & { updatedAt: string };
+  message?: string;
+  errors?: { field: string; message: string }[];
+}
+
 export function useProfileUpdate() {
   const [isLoading, setIsLoading] = useState(false);
 
   const updateProfile = useCallback(async (data: ProfileData) => {
     setIsLoading(true);
     try {
-      // TODO: Replace with actual API call
-      await new Promise((resolve) => setTimeout(resolve, 1000)); // Simulated API delay
+      const res = await apiClient.put<ProfileUpdateResponse>('/api/user/profile', data);
 
-      // Simulate API response
-      const response = {
-        success: true,
-        data: {
-          ...data,
-          updatedAt: new Date().toISOString(),
-        },
-      };
-
-      if (!response.success) {
-        throw new Error('Failed to update profile');
+      if (!res.success) {
+        throw res;
       }
 
-      return response.data;
-    } catch (error) {
+      return res.data;
+    } catch (error: unknown) {
+      if (error && typeof error === 'object' && 'errors' in error) {
+        const apiErr = error as ProfileUpdateResponse;
+        logger.error('Validation error updating profile', { errors: apiErr.errors });
+        throw apiErr;
+      }
       logger.error('Error updating profile', { error });
       throw error;
     } finally {