The Cognitive Communication Coach has multiple processing stages. A user uploads a file, the system may transcribe audio, then Bedrock analyzes the transcript, and finally the result is stored for retrieval.
If this logic is hidden inside one large function, debugging becomes difficult. AWS Step Functions makes the workflow visible and easier to explain.
One Lambda function is simpler at first, but it creates problems:
Step Functions separates the workflow into clear states and provides execution history.
The project uses Lambda for small tasks and Step Functions for orchestration. This matches serverless best practice: use short functions for work units and a managed workflow service for process coordination.
Good cloud architecture is not only about making services work. It is about making the system understandable, observable, and recoverable when something fails.