diff --git a/backend/src/app.module.ts b/backend/src/app.module.ts
index b210c7c..b0b455d 100644
--- a/backend/src/app.module.ts
+++ b/backend/src/app.module.ts
@@ -10,6 +10,7 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { BullModule } from '@nestjs/bullmq';
 import { ThrottlerModule, ThrottlerGuard } from '@nestjs/throttler';
 import { WinstonModule } from 'nest-winston';
+import { CacheModule } from '@nestjs/cache-manager';
 // Redis store will be imported dynamically in the factory
 import { RedisModule } from '@nestjs-modules/ioredis';
 
@@ -93,6 +94,12 @@ import { MigrationModule } from './modules/migration/migration.module';
     }),
     */
 
+    // 🔄 Temporary Cache Module (In-Memory) for build fixes
+    CacheModule.register({
+      isGlobal: true, // Make available globally for all modules
+      ttl: 300, // 5 minutes default TTL
+    }),
+
     // 📝 Setup Winston Logger
     WinstonModule.forRoot(winstonConfig),
 
diff --git a/backend/src/common/auth/auth.module.ts b/backend/src/common/auth/auth.module.ts
index a3bf4ce..9bf974b 100644
--- a/backend/src/common/auth/auth.module.ts
+++ b/backend/src/common/auth/auth.module.ts
@@ -25,6 +25,7 @@ import type { StringValue } from 'ms';
     TypeOrmModule.forFeature([User, RefreshToken]), // [P2-2] Added RefreshToken
     UserModule,
     PassportModule,
+    // CacheModule is now global (from AppModule)
     JwtModule.registerAsync({
       imports: [ConfigModule],
       inject: [ConfigService],
diff --git a/backend/src/modules/user/user.module.ts b/backend/src/modules/user/user.module.ts
index fe0cd06..87402f0 100644
--- a/backend/src/modules/user/user.module.ts
+++ b/backend/src/modules/user/user.module.ts
@@ -3,7 +3,6 @@
 
 import { Module } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
-import { CacheModule } from '@nestjs/cache-manager';
 
 import { UserService } from './user.service';
 import { UserController } from './user.controller';
@@ -27,10 +26,7 @@ import { Permission } from './entities/permission.entity';
       Role,
       Permission,
     ]),
-    // Add CacheModule for CACHE_MANAGER provider
-    CacheModule.register({
-      isGlobal: false, // Keep it local to this module
-    }),
+    // CacheModule is now global (from AppModule)
   ],
   controllers: [UserController],
   providers: [