About

Portrait of Augusto painted in sumi ink.

I'm Augusto, a fullstack developer in São Paulo.

I work end to end in TypeScript, React and NestJS as well as Java/Spring Boot. Before I call a delivery done, I want to see the test passing, the measurement confirming the hypothesis and the security review finished, because that is where the problem the happy path hides shows up.

I started in market intelligence at Itaú, looking for root causes with SQL, Hadoop and Splunk. Then I moved to SLA-bound support at Sintel, where an incident has a deadline, and I arrived at development used to asking what happens when the system fails.

Today at Stech I fix vulnerabilities in financial systems, I delivered a whole education platform, and I build tools with AI agents. In them, the model does not review its own code, authorization comes before the prompt, and every run has a time limit and a cost measured in tokens.

I also taught at Cebrac: a twelve-class track from zero to Power BI and an AI workshop for fifteen students.

End-to-end fullstack in TypeScript, React, NestJS and Java/Spring Boot / Performance measured before optimizing: execution plan, indexes and N+1 / Application security in acceptance, CI pipeline included / Automated testing with Jest, Cypress, pytest and JUnit / LLM operations: RAG with authorization, retrieval evals and agents behind an action gate / Evaluation of language models across voice, vision and text / Data and BI with SQL, Python and Power BI