Serverless AWS Lambda pipeline shrinks images from 11.5MB to 91.2KB using WebAssembly

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A developer built a fully serverless image processing pipeline on AWS Lambda to automate the generation of multiple product image variants for an e-commerce platform. The pipeline triggers automatically when a new image is uploaded to S3, producing optimized and thumbnail versions that are served via CloudFront. The key technical decision was using the 'beautiful-image' library, whose Rust-compiled WebAssembly core ships as a single 469KB binary inside the Lambda ZIP, eliminating native dependencies and architecture-specific builds. This approach reduced deployment complexity to three commands and achieved dramatic file size reductions, with one test image dropping from 11.5MB to 91.2KB. The solution requires no servers, workers, or queue configuration, making it lightweight and straightforward to maintain.

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