Stefan Wehrmeyer
Founder at FragDenStaat
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolStefan Wehrmeyer is a founder and transparency activist with 17 years of experience building civic tech and open-data tools from Berlin, best known for creating FragDenStaat.de, Germany’s leading Freedom of Information campaign platform. He combines hands-on back-end engineering—contributing to notable open-source projects like CKAN and dataset libraries—with strategic project leadership at organizations including Open Knowledge Foundation and CORRECTIV. Trained as an IT-Systems engineer (MSc), he specializes in turning complex information flows into actionable, auditable systems that empower public scrutiny. An Ashoka Fellow, he brings an uncommon mix of product-minded advocacy, ops/security awareness from data journalism work, and practical code-level improvements that modernize data platforms.
17 years of coding experience
1 year of employment as a software developer
Master of Science - MS, IT-Systems Engineering, Master of Science - MS, IT-Systems Engineering at University of Potsdam
German, English, French
Github Skills (18)
python10
data-set10
databases10
data-model10
ckan10
sql10
user-data10
database10
catalog9
alembic9
api9
open-data8
sqlalchemy8
restful-api7
api-design7
Programming languages (17)
Github contributions (5)
pudo/dataset
Dec 2013 - Mar 2019
Easy-to-use data handling for SQL data stores with support for implicit table creation, bulk loading, and transactions.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:79 commits, 2 PRs, 21 pushes in 5 years 3 months
Contributions summary:Stefan primarily focused on improving the codebase by addressing syntax issues, upgrading dependencies, and refactoring existing code. They updated import statements, replaced deprecated syntax, and modernized the codebase to support newer Python versions. Furthermore, they transitioned from sqlalchemy-migrate to alembic for database migrations. The user also implemented improvements to iterators and made other minor code changes for enhanced performance and code quality.
pythonimplicitmysqldatabase-accessdataframes
ckan/ckan
Dec 2012 - Apr 2013
CKAN is an open-source DMS (data management system) for powering data hubs and data portals. CKAN makes it easy to publish, share and use data. It powers catalog.data.gov, open.canada.ca/data, data.humdata.org among many other sites.
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits in 4 months
Contributions summary:Stefan contributed to the back-end functionality and codebase of the CKAN data management system. Their work included modifying paster command imports, updating dataset search functionality to handle errors, and replacing Gravatar URLs with scheme-relative URLs for improved security. Additionally, the user made changes to documentation related to the paster user add command and development configuration. These changes indicate involvement in core features and configuration aspects of the CKAN project.
portalspythondatadata-catalogdbpedia
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