A while back I needed to process thousands of images for an e-commerce platform: multiple versions per product, carousel, thumbnail, invoice miniature. Manual processing wasn't an option. The bash scripts I ran from my machine worked, but they depended on me to run them. The solution was clear: a cloud pipeline that triggered automatically every time a new image arrived.
This post is about how I built that pipeline on AWS Lambda using beautiful-image, and why WASM was the key decision that made everything fit together without friction.
The architecture
The flow is simple and completely serverless:
No servers to maintain, no workers to scale, no queues to configure for the basic case. One image comes in, two variants come out, ready to serve from CloudFront.
