https://paulobsa.github.io/Personal blog of Paulo Araújo — Senior Software Engineer writing about Ruby, Rails, distributed systems, and backend engineering. 2026-05-23T14:31:26-03:00 Paulo Araújo https://paulobsa.github.io/ Jekyll © 2026 Paulo Araújo /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 2026-05-23T12:00:00-03:00 2026-05-23T12:00:00-03:00 https://paulobsa.github.io/posts/hello-world/ Paulo Araújo

This is the first post of what will become a series of notes on Ruby, Rails, and backend engineering. I’ve spent the last several years working on production Rails systems — optimizing slow endpoints, modernizing legacy codebases, and untangling event-driven workflows. I want to write down what I’ve learned, partly to refine my own thinking and partly because some of it might be useful to othe...