I design serverless architectures optimized for elastic performance, low operational overhead, and event-driven workflows. Using AWS Lambda or GCP Cloud Functions, I build microservices that react to API calls, queues, scheduled events, or data streams. I implement layered security, cold-start optimization, distributed tracing, and dependency injection. Combined with DynamoDB, S3, EventBridge, and Step Functions, your system becomes resilient, cost-efficient, and horizontally scalable without infrastructure management.