About João

Frontend, fullstack, and AI systems engineering.

I started in product/platform engineering, moved into international fullstack work, and now focus on production AI systems, forward-deployed automation, evals, observability, and secure execution.

I work best on product problems where the UI, backend, AI behavior, and operational constraints all affect the final user experience.
I prefer building observable systems: evals, logs, traces, explicit state, and interfaces that make AI behavior debuggable instead of mysterious.
I care about security boundaries in practical terms: what a model can access, where code can execute, where secrets live, and what the user can verify.
I still treat frontend fundamentals as non-negotiable: semantic HTML, responsive layouts, crawlable public pages, and visual polish that serves the product.