Lucas Madureira

Software Developer · Backend Engineering & Application Security

I build backend systems, internal platforms, and security-focused tooling with Go, TypeScript, Rust, PostgreSQL, and Linux.

Currently working on production systems for SEDUC-PA, with experience across APIs, authentication and authorization, relational databases, administrative workflows, CI/CD, and application hardening.

Selected production work

• CENSO Operacional e Estrutural das Escolas — Go · PostgreSQL · Next.js
  School census platform with data collection, administrative analytics, authorization by organizational scope, reporting, and production operations.

• SADEP — NestJS · Next.js · PostgreSQL · Prisma
  Probationary performance evaluation system with role-based workflows, document handling, auditability, commissions, signatures, and security hardening.

• Avaliação de Candidatos PSS — SEDUC-PA — NestJS · Next.js · TypeScript · Google Sheets
  Candidate evaluation workflow with validation, external data integration, and server-side document generation.

Security & systems projects

• WAF-Proxy — Rust · Lua · Prometheus
  Defensive reverse proxy with bounded request inspection, anomaly scoring, hardened forwarding, rate limiting, tracing, and metrics.

• GoSpector — Go · DNS · TCP · TLS · HTTP
  Modular defensive reconnaissance framework with bounded concurrency, rate limiting, structured output, CI, race detection, and cross-platform releases.

• Desktop Password Vault — Rust · Tauri · React
  Offline password vault using Argon2id, AES-256-GCM envelope encryption, native key handling, CSP hardening, auto-lock, and local-only persistence.

Core stack

Go · TypeScript / JavaScript · Rust · PostgreSQL · Linux · Docker · GitHub Actions · Next.js · NestJS

Links

Portfolio · LinkedIn · Português CV · English CV

Open to remote backend / software engineering opportunities, including international contractor roles.