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JosepRDA/README.md

José Araújo

Embedded systems developer, systems programmer, and CS student.
Currently building a bare-metal RTOS for AVR 8-bit from scratch.

What I work with

Core stack

  • Languages: C, C++, Rust, Assembly (AVR, x86)
  • Domains: Embedded systems, RTOS, OS internals, computer architecture, electronics
  • Graphics: OpenGL, WebGPU (learning Vulkan next)
  • Systems: Linux (compiled my own kernel), systemd internals, QEMU/KVM, Unix tooling (specially GNU binutils)

Secondary

  • Go, Python, Java, C# — enough to get things done
  • OpenCV (exploring), basic ML (regression models)

Projects

🔧 avr-rtos (in progress)

A minimal preemptive RTOS for AVR 8-bit microcontrollers, written in C++ and AVR Assembly.
Implements a cooperative + preemptive scheduler, context switching via timer interrupts, and a basic task API.
Stack: C, AVR Assembly, avr-gcc, QEMU (simavr)

🎮 rust-tracer (Rust)

A basic raytracer built from scratch — no external rendering libraries. Stack: Rust, linear algebra from scratch

🌐 chat-application

Bidirectional TCP client/server over localhost — both sides read and write simultaneously using threads.
Stack: C, POSIX sockets, threads, networking

🦾 ESP-IDF Template Fork

Frozen snapshot of the esp-idf template at a stable stage for personal embedded experiments.
Stack: C, C++, CMake, ESP-IDF

What I'm studying right now

  • OS internals (scheduling, virtual memory, IPC) — building a RTOS is teaching me more than any textbook
  • GPU pipeline architecture
  • Physics simulation (long-term goal: write a physics engine in C++)

Setup

  • OS: Linux (CachyOS + Arch)
  • Editor: (Neovim and VS Code)
  • Hardware: (AVR mcus, Xtensa architecture, good knowledge of x86 intrinsics, currently looking up to learning CUDA)

Popular repositories Loading

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  2. rain-game rain-game Public

    Simple rain game made with lib-gdx and java.

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  3. Simple-Network Simple-Network Public

    A simple connection within the local host with a client and server sides, which both write and read from one another simultaneously.

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  4. esp-idf-template-fork esp-idf-template-fork Public

    Forked from esp-rs/esp-idf-template

    A fork of the esp-idf template, because i wanted to "freeze" the stage where this remained without interference from other people.

    CMake

  5. pong-jaylib pong-jaylib Public

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  6. esp-mqtt esp-mqtt Public

    Um projeto simples que utiliza uma placa esp32 e o framework de desenvolvimento para IoT da espressif(esp-idf) para estabelecer uma conexão MQTT, receber e enviar pacotes de dados.

    C