Hey 👋

I'm Jean-Charles, a software developer with 20 years of professional experience. I specialize in functional programming and systems programming, currently working mainly in Haskell, Rust, and Nix.

Check out my website for articles and more, or my CV for my full experience.

I maintain a few packages in nixpkgs.

• mprisqueeze: MPRIS interface for squeezelite. Uses D-Bus, HTTP, async.
• mqttooth: MQTT to Bluetooth Low Energy bridge (Zigbee2MQTT -> BLE Environmental Sensing). Runs on Raspberry Pi.
• advent-of-code-2023: My solutions to the Advent of Code 2023.

• diverk: Android app to browse GitHub repositories, built with Reflex (FRP).
• htagcli: Command line audio tagger and music organizer.
• systranything: Put anything in your system tray from a YAML file.
• hscalendar: Time tracking webapp, Haskell backend + Elm frontend, deployed with Docker.
• bigball: Dependency graph for Visual Studio solution files.
• minihasklisp: Minimalist Lisp interpreter.
• wolfram: Elementary cellular automaton.
• reflex-tutorial: The official tutorial for reflex along a few other interesting examples.

• ghcid-error-file.nvim: Fast feedback loop with ghcid or ghciwatch.
• fugitive-difftool.nvim: Diff branches in neovim with fugitive.

• circuix-sword: NixOS in a Gameboy shell. DIY retro handheld based on a Raspberry Pi CM3.
• pomodozig: Terminal pomodoro timer in Zig.
• your-hand-in-mine: Piano transcription of an Explosions in the Sky adaptation.