diff --git a/backend/app/User/CreateUserDto.php b/backend/app/User/CreateUserDto.php
new file mode 100644
index 0000000..7c353e5
--- /dev/null
+++ b/backend/app/User/CreateUserDto.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace App\User;
+
+use App\Shared\ValueObject\EmailAddress;
+
+readonly class CreateUserDto
+{
+    public function __construct(
+        public EmailAddress $email,
+        public string $passwordHash,
+        public bool $isAdmin,
+    ) {}
+}
diff --git a/backend/app/User/User.php b/backend/app/User/User.php
new file mode 100644
index 0000000..48bc7c0
--- /dev/null
+++ b/backend/app/User/User.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace App\User;
+
+use App\Shared\ValueObject\EmailAddress;
+
+class User
+{
+    public function __construct(
+        private int $id,
+        private EmailAddress $email,
+        private string $passwordHash,
+        private bool $isAdmin,
+    ) {}
+
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    public function getEmail(): EmailAddress
+    {
+        return $this->email;
+    }
+
+    public function getPasswordHash(): string
+    {
+        return $this->passwordHash;
+    }
+
+    public function isAdmin(): bool
+    {
+        return $this->isAdmin;
+    }
+}
diff --git a/backend/app/User/UserRepository.php b/backend/app/User/UserRepository.php
new file mode 100644
index 0000000..4805f3f
--- /dev/null
+++ b/backend/app/User/UserRepository.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace App\User;
+
+use App\Shared\ValueObject\EmailAddress;
+
+interface UserRepository
+{
+    public function create(CreateUserDto $dto): User;
+
+    public function find(int $id): ?User;
+
+    public function findByEmail(EmailAddress $email): ?User;
+}