Jeroen De Dauw

Jeroen De Dauw
Software Craftsman


I have been working with MediaWiki, the software behind Wikipedia, since 2009. During these 10+ years I have worked for several companies across the globe, including Google and the Wikimedia Foundation. Between 2012 and 2019 I worked for Wikimedia Deutschland as software architect, primarily on the Wikidata project. I created over a dozen MediaWiki extensions, contributed to many more and am one of the maintainers of Semantic MediaWiki.

My MediaWiki services and projects

Wikidata / Wikibase

Wikidata / Wikibase

Core developer with most contributions since 2012.
Director of The Wikibase Consultancy.

Semantic MediaWiki

Semantic MediaWiki

Maintainer since 2011. On 1500+ public wikis. 80+ releases. 70+ contributors. Contract work for several companies.

Maps extension for MediaWiki


Created in 2009. On 1000+ public wikis. 100+ releases. 40+ contributors. Contract work for several companies.

Commercial projects

Community projects

Plus contributions to dozens of extensions

Please consider sponsoring my work

Use my expertise

You can contract me for development work, advise and training. Contact me at JeroenDeDauw[at]

MediaWiki hosting

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