Sebastian Wiesner
Data Engineer
Amsterdam, North Holland, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolSebastian Wiesner is a systems engineer with 16 years of experience who combines satellite mission planning expertise with deep hands‑on work in developer tooling. He is a prolific open‑source contributor across the Emacs ecosystem—including high‑profile projects like Magit and MELPA—where he has driven refactors, package management improvements, theme and UX integrations, and bug fixes. His range spans full‑stack Emacs development, backend tooling (Sphinx, Flycheck), and system‑level engineering such as journald/tracing integrations in Rust, demonstrating fluency from editor ergonomics to OS integration. Known for careful refactoring, improved test coverage, and pragmatic solutions, he excels at turning complex operational requirements into reliable, maintainable tooling.
17 years of coding experience
Zeichner Fachrichtung Ingenierubau EFZ, Architectural Drafting and Architectural CAD/CADD, 5.0, Zeichner Fachrichtung Ingenierubau EFZ, Architectural Drafting and Architectural CAD/CADD, 5.0 at Baugewerbliche Berufsschule ZürichMaster of Science - MS, Artificial Intelligence, Master of Science - MS, Artificial Intelligence at Vrije Universiteit Amsterdam (VU Amsterdam)Berufsmaturität, Technik, Architektur, Life Sciences, Berufsmaturität, Technik, Architektur, Life Sciences at Berufsmaturitätsschule ZürichBachelor's degree, Wirtschaftsinformatik, Bachelor's degree, Wirtschaftsinformatik at ZHAW School of Management and Law
German, English
Github Skills (73)
documentations10
restructuredtext10
python10
package-management10
testing10
configurationmanagement10
ruby10
socketio10
sockets10
systemd10
trace10
syntax-checking10
project-management10
linux10
emacs-lisp10
Programming languages (35)
Github contributions (5)
flycheck/flycheck
Oct 2012 - Nov 2016
On the fly syntax checking for GNU Emacs
Role in this project:
Backend Developer
Backend DeveloperContributions:10 releases, 3812 commits, 224 PRs in 4 years 1 month
Contributions summary:Sebastian contributed to the core functionality of Flycheck by modifying its underlying syntax checking mechanisms and error reporting logic. They focused on refactoring existing code and enhancing the efficiency of processing, including improving error message display and optimizing filtering. Additionally, they made changes to the command-line arguments of specific syntax checkers.
elispripgrepsyntax-checkinggnu-emacschecking
cask/cask
Feb 2013 - Apr 2016
Project management tool for Emacs
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:142 commits, 15 PRs, 16 pushes in 3 years 3 months
Contributions summary:Sebastian primarily contributed to the core functionality of the Emacs package management tool, Cask. They enhanced the tool's capabilities by implementing features such as listing and updating packages, adding a command to print the package version, and incorporating a package-file directive. The user also focused on improving the security and maintainability of Cask by replacing the `load` function with a manual reading and evaluation process and refactoring the codebase to improve resource handling. Moreover, the user added functionality to improve the error reporting and integrate with EPL library.
emacsproject-management-toolmanagement-toolproject-managementemacs-lisp
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