diff --git a/src/backend/api/v1/projects/serializers.py b/src/backend/api/v1/projects/serializers.py
index 4075e12..6b8a1c2 100644
--- a/src/backend/api/v1/projects/serializers.py
+++ b/src/backend/api/v1/projects/serializers.py
@@ -13,7 +13,7 @@
 
 
 class DirectionSerializer(serializers.ModelSerializer):
-    """Сериализатор специалиста."""
+    """Сериализатор направления разработки."""
 
     class Meta:
         model = Direction
diff --git a/src/backend/apps/general/constants.py b/src/backend/apps/general/constants.py
index dd37333..3d26f8d 100644
--- a/src/backend/apps/general/constants.py
+++ b/src/backend/apps/general/constants.py
@@ -4,7 +4,7 @@
 MIN_LENGTH_SPECIALIZATION_NAME = 2
 LENGTH_SPECIALIZATION_NAME_ERROR_TEXT = (
     f"Длина поля от {MIN_LENGTH_SPECIALIZATION_NAME} до "
-    f"{MIN_LENGTH_SPECIALIZATION_NAME} символов."
+    f"{MAX_LENGTH_SPECIALIZATION_NAME} символов."
 )
 REGEX_SPECIALIZATION_NAME = r"(^[A-Za-zА-Яа-яЁё\s\/]+)\Z"
 REGEX_SPECIALIZATION_NAME_ERROR_TEXT = (
diff --git a/src/backend/apps/general/migrations/0002_alter_specialist_specialization_and_more.py b/src/backend/apps/general/migrations/0002_alter_specialist_specialization_and_more.py
index 10d4255..fbe52f9 100644
--- a/src/backend/apps/general/migrations/0002_alter_specialist_specialization_and_more.py
+++ b/src/backend/apps/general/migrations/0002_alter_specialist_specialization_and_more.py
@@ -17,7 +17,7 @@ class Migration(migrations.Migration):
                 max_length=100,
                 validators=[
                     django.core.validators.MinLengthValidator(
-                        limit_value=2, message="Длина поля от 2 до 2 символов."
+                        limit_value=2, message="Длина поля от 2 до 100 символов."
                     ),
                     django.core.validators.RegexValidator(
                         message="Специализация может содержать: кириллические и латинские символы,пробелы и символ /",
diff --git a/src/backend/apps/projects/apps.py b/src/backend/apps/projects/apps.py
index cbd9abe..2414b56 100644
--- a/src/backend/apps/projects/apps.py
+++ b/src/backend/apps/projects/apps.py
@@ -4,3 +4,8 @@
 class ProjectConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
     name = "apps.projects"
+
+    def ready(self):
+        from . import signals  # noqa: F401,
+
+        return super().ready()
diff --git a/src/backend/apps/projects/constants.py b/src/backend/apps/projects/constants.py
index 686ff2e..abcf978 100644
--- a/src/backend/apps/projects/constants.py
+++ b/src/backend/apps/projects/constants.py
@@ -20,8 +20,8 @@
 MAX_LENGTH_DIRECTION_NAME = 20
 MIN_LENGTH_DIRECTION_NAME = 2
 LENGTH_DIRECTION_NAME_ERROR_TEXT = (
-    f"Длина поля от {MIN_LENGTH_PROJECT_NAME} до {MAX_LENGTH_PROJECT_NAME} "
-    "символов."
+    f"Длина поля от {MIN_LENGTH_DIRECTION_NAME} до "
+    f"{MAX_LENGTH_DIRECTION_NAME} символов."
 )
 REGEX_DIRECTION_NAME = r"(^[A-Za-zА-Яа-яЁё]+)\Z"
 REGEX_DIRECTION_NAME_ERROR_TEXT = (
@@ -47,5 +47,4 @@
     (3, "Черновик"),
 )
 
-
 PROJECTS_PER_PAGE = 10
diff --git a/src/backend/apps/projects/migrations/0003_alter_direction_name_and_more.py b/src/backend/apps/projects/migrations/0003_alter_direction_name_and_more.py
new file mode 100644
index 0000000..b3c914f
--- /dev/null
+++ b/src/backend/apps/projects/migrations/0003_alter_direction_name_and_more.py
@@ -0,0 +1,40 @@
+# Generated by Django 5.0.1 on 2024-03-27 19:19
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("general", "0002_alter_specialist_specialization_and_more"),
+        ("projects", "0002_alter_project_busyness"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="direction",
+            name="name",
+            field=models.CharField(
+                max_length=20,
+                unique=True,
+                validators=[
+                    django.core.validators.MinLengthValidator(
+                        limit_value=2,
+                        message="Длина поля от 2 до 20 символов.",
+                    ),
+                    django.core.validators.RegexValidator(
+                        message="Направление разработки может содержать: кириллические и латинские символы.",
+                        regex="(^[A-Za-zА-Яа-яЁё]+)\\Z",
+                    ),
+                ],
+                verbose_name="Название",
+            ),
+        ),
+        migrations.AddConstraint(
+            model_name="projectspecialist",
+            constraint=models.UniqueConstraint(
+                fields=("project", "specialist", "level"),
+                name="projects_projectspecialist_unique_specialist_per_project",
+            ),
+        ),
+    ]
diff --git a/src/backend/apps/projects/models.py b/src/backend/apps/projects/models.py
index f59c1d7..a26f29e 100644
--- a/src/backend/apps/projects/models.py
+++ b/src/backend/apps/projects/models.py
@@ -199,3 +199,9 @@ class Meta:
         verbose_name = "Специалист проекта"
         verbose_name_plural = "Специалисты проекта"
         default_related_name = "project_specialists"
+        constraints = (
+            models.UniqueConstraint(
+                fields=("project", "specialist", "level"),
+                name="%(app_label)s_%(class)s_unique_specialist_per_project",
+            ),
+        )
diff --git a/src/backend/apps/projects/signals.py b/src/backend/apps/projects/signals.py
new file mode 100644
index 0000000..70085ab
--- /dev/null
+++ b/src/backend/apps/projects/signals.py
@@ -0,0 +1,13 @@
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+
+from apps.projects.models import Project
+
+
+@receiver(post_save, sender=Project)
+def create_user_profile(sender, instance, created, **kwargs):
+    """Метод присвоения статуса is_organizer пользователю."""
+
+    if created and not instance.creator.is_organizer:
+        instance.creator.is_organizer = True
+        instance.creator.save()