I’m Paulo Araújo, a Senior Software Engineer based in Brazil with 7+ years building scalable backend systems and 10+ years in the IT industry.

Currently at Nubank, working on event-driven financial services in Clojure and AWS. Before that, I spent years deep in Ruby on Rails across fintech, retail, and marketplace platforms — performance tuning, distributed systems, and modernizing legacy codebases.

This blog is where I write about Ruby, Rails, and the backend engineering problems I find interesting. Expect notes from real work rather than tutorials.

Elsewhere

• GitHub — github.com/paulobsa
• LinkedIn — linkedin.com/in/araujopr
• Email — araujo.pauloricardo@gmail.com