Step Functions: Orchestrating Multi-Step Workflows and the Saga Pattern
When a process has many steps, branches, and error handling, cramming it all into one Lambda gets messy and hard to read. Step Functions pulls the orchestration logic out into a declarative state machine. Build a link-moderation workflow (safety scan, then activate or reject), with Retry, Catch, and a direct DynamoDB call without Lambda. Covers Standard vs Express, and the saga pattern for undoing a mid-process failure.