diff --git a/mobile/lib/infrastructure/repositories/user_api.repository.dart b/mobile/lib/infrastructure/repositories/user_api.repository.dart
index d21a1b71a6..20049cac23 100644
--- a/mobile/lib/infrastructure/repositories/user_api.repository.dart
+++ b/mobile/lib/infrastructure/repositories/user_api.repository.dart
@@ -1,3 +1,4 @@
+import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:http/http.dart';
@@ -18,8 +19,34 @@ class UserApiRepository extends ApiRepository {
   }
 
   Future<String> createProfileImage({required String name, required Uint8List data}) async {
-    final res = await checkNull(_api.createProfileImage(MultipartFile.fromBytes('file', data, filename: name)));
-    return res.profileImagePath;
+    // Workaround: the autogenerated OpenAPI client forces `Content-Type: multipart/form-data`
+    // without a boundary, which can break multer parsing server-side.
+    // We bypass `UsersApi.createProfileImage()` and send the multipart request directly,
+    // while still reusing the configured basePath + auth headers + http client.
+    final apiClient = _api.apiClient;
+
+    final headers = <String, String>{};
+    await apiClient.authentication?.applyToParams(<QueryParam>[], headers);
+    headers.addAll(apiClient.defaultHeaderMap);
+    headers.remove('Content-Type');
+    headers.remove('content-type');
+
+    final filename = name.isNotEmpty ? name : 'profile-picture.png';
+    final uri = Uri.parse('${apiClient.basePath}/users/profile-image');
+
+    final request = MultipartRequest('POST', uri)
+      ..headers.addAll(headers)
+      ..files.add(MultipartFile.fromBytes('file', data, filename: filename));
+
+    final streamed = await apiClient.client.send(request);
+    final response = await Response.fromStream(streamed);
+
+    if (response.statusCode >= 400) {
+      throw ApiException(response.statusCode, response.body);
+    }
+
+    final body = jsonDecode(response.body) as Map<String, dynamic>;
+    return body['profileImagePath'] as String;
   }
 
   Future<List<UserDto>> getAll() async {