Learn how to design mission-critical systems that process millions of transactions daily using serverless services in this AWS re:Invent 2025 conference session. Discover key serverless patterns to accelerate modernization efforts as you follow a transformational journey from legacy monolithic architecture to scalable serverless solutions. Explore the decomposition of monolithic systems and understand how to leverage AWS Lambda, AWS Step Functions, Amazon DynamoDB, Amazon Simple Queue Service (Amazon SQS), and Amazon Simple Notification Service (Amazon SNS) to build resilient, scalable processing systems. Gain practical insights into architectural patterns and best practices for implementing serverless technologies in high-volume, mission-critical environments where reliability and performance are paramount.