I’m happy to supervise theses that make meaningful contributions to open source projects. Contributions may be improvements, extensions, plugins, etc. for established open source tools - preferably those that I personally know and frequently use (e.g. Arch Linux, Emacs, Org-Mode, Vim, Ledger-Cli, Mu, laginn, gogs, flask, various fuzzers, blockchain technology) - but I am also open for your suggestions.
If you are interested in doing this, please send me a short proposal and outline of the project.