Duolingo optimized its compute infrastructure and reduced costs by over 60% in one quarter by migrating from a monolithic architecture to a Docker-based microservices model on AWS. Using Amazon ECS, EC2 Spot Instances, and Spotinst’s Elastigroup, Duolingo automated scaling, optimized resource allocation, and minimized operational overhead. The transition enabled faster deployments, improved scalability, and better cost efficiency, cutting total AWS costs by 25%. With these savings, Duolingo reinvests in AI-driven language learning innovations, leveraging machine learning and deep analytics to enhance user experience and improve educational outcomes.

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