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Marek Mącznik

Software engineer working across systems, developer tooling, and multimedia.

I like understanding how things work below the abstraction layer — and building tools when the existing workflow gets in the way.

My background spans C/C++, embedded systems and multimedia, with an increasing focus on developer productivity and AI-assisted tooling.

Selected projects

GitLab CI workflows without leaving Neovim.

Inspect and run pipelines, browse jobs and logs, retry jobs, and work with artifacts directly from the editor.

Lua · GitLab CI · Neovim

Conan 2.x integration for Neovim.

Manage profiles, packages, remotes and common C/C++ dependency workflows without turning the terminal into an archaeological excavation.

Lua · Conan · C/C++ · Neovim

An experimental local-first coding agent.

Exploring tool use, persistent sessions, approval boundaries, workspace context and multiple LLM backends.

Python · LLM tooling · Agents

ESP32-based sound level meter using an I²S MEMS microphone with real-time signal processing and frequency weighting.

A small reminder that sometimes software needs wires.

C/C++ · ESP32 · DSP · Embedded

My reproducible development environment for macOS and Linux, built around Nix and Home Manager.

Neovim, WezTerm, tmux, Git and AI-assisted development tooling — versioned instead of being reconstructed from increasingly unreliable memory every time a machine changes.

Nix · Home Manager · Neovim · Lua · Developer Tooling

Custom Corne keyboards

My configurations and firmware experiments for the Corne (CRKBD) split keyboard.

  • vial-crkbd-config — wired Vial/QMK build and custom keymap.
  • zmk-corne-config — wireless ZMK build with custom hardware integration and a Cirque trackpad driver.

Because apparently buying a keyboard and simply using it would have been too easy.

C · QMK · ZMK · Zephyr · Embedded

Interests

C · C++ · Python · Lua · Rust · Go

Developer tooling · Build systems · Multimedia · Embedded systems · DSP · LLM tooling


I use Neovim, btw.

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