PokeMMO Breed Simulator
Planning tool for breeding and capture decisions. Built to remove guesswork and make progression planning cleaner.
I build software people can actually use.
I am a Computer Science student at UNAMA.
I am João, a developer based in Belem, Brasil.
I work at projeto v3l0z academy (v3l0z.com.br), a student startup inside UNAMA (Grupo Ser Educacional).
I work mostly on web products and backend services, and I also spend time on lower-level experiments because they sharpen the way I think about performance, architecture, and trade-offs. I do most development in Neovim and regularly customize my tooling in dotfiles.
What I bring to a team
Product focus: I like turning rough requirements into shipped features, then improving them with real feedback.
Breadth and depth: Most daily work is TypeScript and Kotlin, and I reach for C/C++ or Rust when performance and control matter.
Team habits: I care about readable code, clear pull requests, and practical tests so teams can move fast without chaos.
Selected work
Bun Rinha Backend
High-performance backend challenge implementation focused on throughput, low overhead, and clear request-path design.
Bible Rust
Rust project for reading Bible verses from XML files, built while deepening systems-level and language fundamentals.
Workout OS
Work-in-progress app around workout tracking and structured training flow design.
Upcoming work
tauri-usb-iso-tool
GUI tool for flashing ISO images to USB, focused on reliability and straightforward UX.
vulkan-c
C game engine project using the Vulkan API for rendering and low-level graphics control.
Private projects
Obrigado.vc
Brazilian creator-donations platform MVP with Pix payments through Asaas, including creator pages, payment flow, and platform fee handling. Core work includes reactive backend architecture, auth, migrations, and webhook reliability.
James Avisa
Multi-tenant condominium management platform with web, mobile, and API applications. Work includes visitor and resident flows, role-based product surfaces, and communication features with Agora voice/video integration.
Gestao de Salas (V3L0Z Academy)
Private room-management product split across frontend and backend apps, covering reservations, permissions, request lifecycle, and operational visibility for campus workflows.
Hiring
I am open to backend or full-stack roles where I can own features end to end, collaborate closely with product, and keep raising code quality over time.