The document explains how a global pharmaceutical company resolved payload and authentication limitations caused by AWS ALB-to-Lambda integration. Pages 1–2 show that the 1 MB payload cap blocked critical functionality, while maintaining OAuth/OIDC authentication with an external identity provider added complexity. The solution, detailed on page 3, migrated the architecture to AWS API Gateway with JWT authorizers, modernizing authentication, increasing payload capacity to 6 MB, and simplifying infrastructure. Page 4 highlights results: 600% payload expansion, unified authentication, improved scalability, stronger security, faster feature delivery, and a better developer experience.

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