diff --git a/src/Services/Product/Product.Domain/DTOs/CategoryDto.cs b/src/Services/Product/Product.Domain/DTOs/CategoryDto.cs
new file mode 100644
index 0000000..a4c6da0
--- /dev/null
+++ b/src/Services/Product/Product.Domain/DTOs/CategoryDto.cs
@@ -0,0 +1,9 @@
+namespace Product.Domain.DTOs;
+
+public class CategoryDto
+{
+    public int Id { get; set; }
+    public string? Name { get; set; }
+    public string? Description { get; set; }
+    public string? Icon { get; set; }
+}
diff --git a/src/Services/Product/Product.Domain/DTOs/ProductDto.cs b/src/Services/Product/Product.Domain/DTOs/ProductDto.cs
new file mode 100644
index 0000000..c04ef19
--- /dev/null
+++ b/src/Services/Product/Product.Domain/DTOs/ProductDto.cs
@@ -0,0 +1,15 @@
+namespace Product.Domain.DTOs;
+
+public class ProductDto
+{
+    public int Id { get; set; }
+    public string? Name { get; set; }
+    public string? Description { get; set; }
+    public string? Icon { get; set; }
+    public decimal BuyingPrice { get; set; }
+    public decimal SellingPrice { get; set; }
+    public int UnitsInStock { get; set; }
+    public bool IsActive { get; set; }
+    public bool IsDiscontinued { get; set; }
+    public string? ProductCategoryName { get; set; }
+}
diff --git a/src/Services/Product/Product.Domain/Entities/.gitkeep b/src/Services/Product/Product.Domain/Entities/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/src/Services/Product/Product.Domain/Entities/BaseEntity.cs b/src/Services/Product/Product.Domain/Entities/BaseEntity.cs
new file mode 100644
index 0000000..0daa734
--- /dev/null
+++ b/src/Services/Product/Product.Domain/Entities/BaseEntity.cs
@@ -0,0 +1,18 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Product.Domain.Entities;
+
+public class BaseEntity
+{
+    public int Id { get; set; }
+
+    [MaxLength(40)]
+    public string? CreatedBy { get; set; }
+
+    [MaxLength(40)]
+    public string? UpdatedBy { get; set; }
+
+    public DateTime UpdatedDate { get; set; }
+
+    public DateTime CreatedDate { get; set; }
+}
diff --git a/src/Services/Product/Product.Domain/Entities/Product.cs b/src/Services/Product/Product.Domain/Entities/Product.cs
new file mode 100644
index 0000000..a03a1a2
--- /dev/null
+++ b/src/Services/Product/Product.Domain/Entities/Product.cs
@@ -0,0 +1,21 @@
+namespace Product.Domain.Entities;
+
+public class Product : BaseEntity
+{
+    public required string Name { get; set; }
+    public string? Description { get; set; }
+    public string? Icon { get; set; }
+    public decimal BuyingPrice { get; set; }
+    public decimal SellingPrice { get; set; }
+    public int UnitsInStock { get; set; }
+    public bool IsActive { get; set; }
+    public bool IsDiscontinued { get; set; }
+
+    public int? ParentId { get; set; }
+    public Product? Parent { get; set; }
+
+    public int ProductCategoryId { get; set; }
+    public required ProductCategory ProductCategory { get; set; }
+
+    public ICollection<Product> Children { get; } = [];
+}
diff --git a/src/Services/Product/Product.Domain/Entities/ProductCategory.cs b/src/Services/Product/Product.Domain/Entities/ProductCategory.cs
new file mode 100644
index 0000000..5e37d40
--- /dev/null
+++ b/src/Services/Product/Product.Domain/Entities/ProductCategory.cs
@@ -0,0 +1,10 @@
+namespace Product.Domain.Entities;
+
+public class ProductCategory : BaseEntity
+{
+    public required string Name { get; set; }
+    public string? Description { get; set; }
+    public string? Icon { get; set; }
+
+    public ICollection<Product> Products { get; } = [];
+}
diff --git a/src/Services/Product/Product.Domain/Interfaces/.gitkeep b/src/Services/Product/Product.Domain/Interfaces/.gitkeep
deleted file mode 100644
index e69de29..0000000