diff --git a/src/main/java/com/springboot/ratelimiter/user/service/UserService.java b/src/main/java/com/springboot/ratelimiter/user/service/UserService.java
new file mode 100644
index 0000000..a2c85ba
--- /dev/null
+++ b/src/main/java/com/springboot/ratelimiter/user/service/UserService.java
@@ -0,0 +1,54 @@
+package com.springboot.ratelimiter.user.service;
+
+import com.springboot.ratelimiter.common.model.page.CustomPage;
+import com.springboot.ratelimiter.user.User;
+import com.springboot.ratelimiter.user.payload.request.CreateUserRequest;
+import com.springboot.ratelimiter.user.payload.request.UpdateUserRequest;
+import com.springboot.ratelimiter.user.payload.request.UserPagingRequest;
+
+/**
+ * Service interface named {@link UserService} for managing user operations.
+ */
+public interface UserService {
+
+    /**
+     * Creates a new user based on the provided CreateUserRequest.
+     *
+     * @param createUserRequest the CreateUserRequest containing user details
+     * @return the created User object
+     */
+    User createUser(CreateUserRequest createUserRequest);
+
+    /**
+     * Retrieves a user by their unique identifier.
+     *
+     * @param id the identifier of the user to retrieve
+     * @return the User object if found, otherwise null
+     */
+    User getUserById(String id);
+
+    /**
+     * Updates an existing user identified by their unique identifier.
+     *
+     * @param id               the identifier of the user to update
+     * @param updateUserRequest the UpdateUserRequest containing updated user details
+     * @return the updated User object
+     */
+    User updateUser(String id, UpdateUserRequest updateUserRequest);
+
+    /**
+     * Deletes a user by their unique identifier.
+     *
+     * @param id the identifier of the user to delete
+     */
+    void deleteUserById(String id);
+
+    /**
+     * Retrieves a paginated list of users based on the provided UserPagingRequest.
+     *
+     * @param userPagingRequest the UserPagingRequest containing pagination parameters
+     * @return a CustomPage containing the list of users
+     */
+    CustomPage<User> getUsers(UserPagingRequest userPagingRequest);
+
+}