Describing Serverless First Principles, including event-driven design, scalability, and managed infrastructure. Describing the benefits of modular and event-based systems that enhance resilience and enable rapid innovation. Diving into cost-optimization strategies using AWS serverless pay-as-you-go pricing and auto-scaling features. Real-world application/case study: how serverless technologies like AWS Lambda, DynamoDB, Aurora, S3, SNS, Event-bus, SQS and Step Functions help streamline warehouse operations and logistics at GymBeam, from inventory management, to real-time order fulfillment with next day delivery.