Building a Serverless Weather Pipeline on AWS: A Step-by-Step Walkthrough
This is a build log for someone who's used AWS a bit — deployed a Lambda from the console, poked around S3 — but hasn't touched CDK, Step Functions, EventBridge Scheduler, or GitHub's OIDC setup before. I'll explain each concept the first time it comes up, and show the actual code behind every piece, roughly in the order I built it.
Here's what it ends up doing: every 10 minutes, EventBridge Scheduler kicks off a Step Functions workflow that pulls current weather for five cities in parallel from a free public API, reshapes the results into JSON Lines, drops them into S3 in a partitioned layout, and makes them queryable in Athena with plain SQL. No crawler, and no AWS credentials sitting anywhere in the GitHub repo that deploys it.
Serverless Weather Data Pipeline
A small but complete serverless data pipeline on AWS
