diff --git a/packages/backend/src/users/dto/create-user.dto.ts b/packages/backend/src/users/dto/create-user.dto.ts
index 99d3a64..7a4e6e4 100644
--- a/packages/backend/src/users/dto/create-user.dto.ts
+++ b/packages/backend/src/users/dto/create-user.dto.ts
@@ -1,6 +1,7 @@
 import { IsEmail, IsNotEmpty, MinLength } from 'class-validator';
+import { ICreateUserDTO } from '@gim/shared';
 
-export class CreateUserDto {
+export class CreateUserDto implements ICreateUserDTO {
   @IsEmail({}, { message: "L'email doit être valide" })
   email!: string;
 
diff --git a/packages/backend/src/users/entities/user.entity.ts b/packages/backend/src/users/entities/user.entity.ts
index f7e9ceb..d35be10 100644
--- a/packages/backend/src/users/entities/user.entity.ts
+++ b/packages/backend/src/users/entities/user.entity.ts
@@ -1,3 +1,4 @@
+import { IUser } from '@gim/shared';
 import {
   Entity,
   PrimaryGeneratedColumn,
@@ -6,7 +7,7 @@ import {
 } from 'typeorm';
 
 @Entity('utilisateurs')
-export class User {
+export class User implements IUser {
   @PrimaryGeneratedColumn('uuid')
   id!: string;
 
diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
new file mode 100644
index 0000000..75c70a4
--- /dev/null
+++ b/packages/shared/src/index.ts
@@ -0,0 +1 @@
+export * from './users/user.interface';
\ No newline at end of file
diff --git a/packages/shared/src/users/user.interface.ts b/packages/shared/src/users/user.interface.ts
new file mode 100644
index 0000000..6adb59d
--- /dev/null
+++ b/packages/shared/src/users/user.interface.ts
@@ -0,0 +1,20 @@
+/**
+ * Contrat pour les données envoyées lors de l'inscription
+ */
+export interface ICreateUserDTO {
+  email: string;
+  motDePasse: string;
+  nom: string;
+  prenom: string;
+}
+
+/**
+ * Contrat pour les données renvoyées par l'API (profil public)
+ */
+export interface IUser {
+  id: string;
+  email: string;
+  nom: string;
+  prenom: string;
+  dateCreation: Date;
+}
\ No newline at end of file