Yanick Witschi
Unternehmensinhaber at terminal42 gmbh
Bern, Bern, Switzerland
Summary
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RockstarYanick Witschi is a seasoned back-end engineer and business owner based in Bern, Switzerland, with 15 years of hands-on experience building and improving PHP ecosystems. As proprietor of terminal42 gmbh he blends practical DevOps sensibilities with deep library-level work, contributing to high-profile projects like Symfony, Composer and API Platform. His open-source contributions span documentation improvements for Symfony, critical fixes and features in HttpFoundation/HttpKernel, and performance and constraint logic refinements in Composer and semver. Yanick’s work shows a consistent focus on reliability, developer ergonomics and automation—adding deployment tasks, cache and session controls, and clearer docs to help teams ship safely. A detail-oriented engineer, he often addresses subtle interoperability and serialization issues that quietly improve robustness across widely used frameworks.
15 years of coding experience
Github Skills (44)
dependency-management10
caching10
cms10
api-platform10
package-management10
back-end-development10
apidoc10
testing10
http10
wpgraphql10
php10
api10
rest10
wordpress-graphql10
symfony10
Programming languages (18)
Github contributions (5)
composer/semver
Apr 2020 - Mar 2022
Semantic versioning utilities with the addition of version constraints parsing and checking.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 reviews, 10 commits, 7 PRs in 1 year 11 months
Contributions summary:Yanick primarily focused on enhancing the `composer/semver` library, a semantic versioning utility. Their contributions include implementing bounds functionality, improving constraint parsing, and optimizing multi-constraint logic. The user introduced a factory method to optimize multi-constraints and refactored unit tests to improve code structure and test coverage. These changes were focused on improving the library's core functionality and overall efficiency.
parsingsemantic-versioning
symfony/symfony-docs
Feb 2013 - Sep 2022
The Symfony documentation
Role in this project:Technical Writer
Technical WriterContributions:3 reviews, 21 commits, 13 PRs in 9 years 9 months
Contributions summary:Yanick's contributions primarily focus on improving and expanding the Symfony documentation. They addressed typos, clarified explanations, and added new content related to specific components like Dotenv, HttpClient, and Messenger. The user also added a new section to the documentation standards, specifically focused on belittling words, demonstrating a commitment to enhancing the readability and clarity of the documentation. Their work spans multiple areas, showcasing a dedication to creating comprehensive and accessible documentation for Symfony users.
symfonyphp
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