Serverless technology enhances developer productivity by offloading capacity management and reducing costs, but integrating caching into a serverless stack often requires a shift to serverful solutions, which can be complex. The author explores the use of Momento's serverless cache to improve performance in a serverless application that involves a social network API using AWS Lambda and DynamoDB. By implementing a look-aside caching pattern with Momento, the application's performance improved significantly, with the average client-side latencies for retrieving user data reduced by 43% and up to 86% for scenarios involving multiple database calls. The process of adding the Momento cache to the existing Lambda functions was quick, taking less than an hour, which led to lower costs, improved scalability, and enhanced user experience by reducing latency without the complications of managing hot keys or partitions in DynamoDB.