diff --git a/app/models/base.py b/app/models/base.py
index 02e07ff..34e1fc3 100644
--- a/app/models/base.py
+++ b/app/models/base.py
@@ -16,6 +16,9 @@ class User(Base):
 
     id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
     email: Mapped[str] = mapped_column(String(255), unique=True, index=True, nullable=False)
+    username: Mapped[Optional[str]] = mapped_column(String(50), unique=True, index=True, nullable=True)
+    full_name: Mapped[Optional[str]] = mapped_column(String(255), nullable=True)
+    phone_number: Mapped[Optional[str]] = mapped_column(String(20), nullable=True)
     hashed_password: Mapped[str] = mapped_column(String(255), nullable=False)
     role: Mapped[str] = mapped_column(String(50), default="developer", nullable=False)
     is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
diff --git a/app/schemas/auth.py b/app/schemas/auth.py
index b4a2012..e88cae1 100644
--- a/app/schemas/auth.py
+++ b/app/schemas/auth.py
@@ -28,6 +28,9 @@ class UserBase(BaseModel):
 class UserCreate(UserBase):
     """User creation schema."""
     password: str = Field(..., min_length=8, examples=["strong_password_123"])
+    username: Optional[str] = Field(None, examples=["janesmith"])
+    full_name: Optional[str] = Field(None, examples=["Jane Smith"])
+    phone_number: Optional[str] = Field(None, examples=["+1234567890"])
 
 
 
@@ -40,6 +43,9 @@ class UserLogin(UserBase):
 class UserResponse(UserBase):
     """User response schema."""
     id: int
+    username: Optional[str]
+    full_name: Optional[str]
+    phone_number: Optional[str]
     is_active: bool
     is_superuser: bool
     created_at: datetime
diff --git a/app/services/user.py b/app/services/user.py
index 671c6cd..3f92313 100644
--- a/app/services/user.py
+++ b/app/services/user.py
@@ -27,6 +27,9 @@ async def create_user(db: AsyncSession, user_in: UserCreate) -> User:
     hashed_password = get_password_hash(user_in.password)
     db_user = User(
         email=user_in.email,
+        username=user_in.username,
+        full_name=user_in.full_name,
+        phone_number=user_in.phone_number,
         hashed_password=hashed_password,
     )
     db.add(db_user)