I wrote a terminal multiplexer with out-of-the-box support for search, mouse-controlled scrollback, and i3-like keybindings. Imagine tmux with a smaller learning curve and more sane defaults. Featured on Linux Unplugged podcast.
I regularly contribute to the Nix build system's package repository, which powers the devops tools NixOps and NixOS. I'm currently adding support for compiling Rust projects to embedded targets.
I'm working on a build system for Redox OS, a new operating system written in Rust. This involves cross-compiling packages from gcc to llvm to rustc, while porting software such as python.