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joão

Software Developer · Belém, Brazil

JOÃOMADUREIRA

build systems that stay correct under pressure.

Go · TypeScript · Backend SystemsSecure Systems · Application SecurityRemote worldwide · Contractor

✦ BACKEND SYSTEMS ✦ SECURE SOFTWARE ✦ APPLICATION SECURITY ✦ GO ✦ TYPESCRIPT ✦ POSTGRESQL ✦ DOCKER ✦ LINUX ✦ RUST ✦ TYPE-SAFE ✦ TESTED ✦ PRODUCTION SYSTEMS ✦ BACKEND SYSTEMS ✦ SECURE SOFTWARE ✦ APPLICATION SECURITY ✦ GO ✦ TYPESCRIPT ✦ POSTGRESQL ✦ DOCKER ✦ LINUX ✦ RUST ✦ TYPE-SAFE ✦ TESTED ✦ PRODUCTION SYSTEMS

✦ BACKEND SYSTEMS ✦ SECURE SOFTWARE ✦ APPLICATION SECURITY ✦ GO ✦ TYPESCRIPT ✦ POSTGRESQL ✦ DOCKER ✦ LINUX ✦ RUST ✦ TYPE-SAFE ✦ TESTED ✦ PRODUCTION SYSTEMS ✦ BACKEND SYSTEMS ✦ SECURE SOFTWARE ✦ APPLICATION SECURITY ✦ GO ✦ TYPESCRIPT ✦ POSTGRESQL ✦ DOCKER ✦ LINUX ✦ RUST ✦ TYPE-SAFE ✦ TESTED ✦ PRODUCTION SYSTEMS

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THE

Story

I'm a software developer based in Belém, Brazil, building production systems for SEDUC-PA — the State of Pará's Department of Education. My day-to-day work sits around Go, TypeScript, PostgreSQL, APIs, authentication, and internal platforms used in real government workflows.

On the Censo Operacional project, I built the school data collection application and the original administrative dashboard. I also contribute to systems for civil-servant evaluation and public hiring, where correctness, traceability, and secure access matter more than novelty.

Security is the direction I keep pushing deeper: threat modeling, hardening, application security, and defensive tooling. GoSpector explores bounded reconnaissance pipelines; WAF-Proxy explores request inspection and policy enforcement in Rust and Lua. I'm open to remote contractor roles worldwide, especially backend-heavy teams that treat security as part of software quality.

“You can't secure what you don't understand.”

Behind the curtains

Code, commits

&& the music.

João's GitHub
Latest public activity1d ago

"chore: fix issue 226 test migration workflow"

Repo: CENSO-Operacional-Escolas

Let's work together

LET'S BUILD

something real.