From payment systems to AI tools, I like understanding how things work and taking ideas into production. Currently at ADP, also building products of my own.
I'm João. I build software, break things, fix them, and usually end up learning something new in the process.
My focus is backend, distributed systems, and infrastructure. I've worked on payments at Bazk, procurement at SAP, and now AI tools at ADP. I also work with React and Flutter when the product needs it.
I like looking beneath the abstractions and choosing solutions that fit the problem and stay easy to maintain. For my own products, I take care of the idea, architecture, and interface through to launch.
I'm exploring how AI, LLMs, and agents change everyday development, and writing about what I learn. I'm also studying cybersecurity, with an MBA at USP/Esalq starting in October 2026.
Outside of work, I'm usually running, playing videogames, or hanging out with my dogs.
Tech Digest and Alturo are projects I build independently. I handle product decisions, architecture, data, and interface.
A daily tech digest that monitors selected sources, classifies and ranks articles, removes duplicate stories, and emails up to eight links worth opening.
Python · Jev / TypeSafe · Railway · Resend
digest.joaoac.comA reading companion for iPhone: focus sessions, a personal library, and a giraffe that evolves with the time you read.
Swift · SwiftUI · SwiftData · Next.js · Cloudflare Workers · Resend
usealturo.appToday I build AI tools at ADP. Before that, I worked on procurement at SAP and payment systems at Bazk.
View all experiencesI write to make sense of what I learn about backend systems, development with AI, and application security.
A public IDOR incident, why this class of bug is so common, and how to keep it out of your own APIs.
What AI-assisted development changes for engineers, why the bar is rising, and which skills still hold value.
Five clean code principles, with examples, to make code easier to read, change and review.
Have a product idea, a question about something I wrote, or a role in mind? Send me a message. I read every one.