Jan Kellermann
Geschäftsführender Gesellschafter CTO at werk21 GmbH
Flensburg, Schleswig-Holstein, Germany
Summary
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SeniorJan Kellermann is a seasoned technology leader and entrepreneur focused on digital sovereignty and open-source solutions for NGOs, politics, and government. He is the Geschäftsführer Gesellschafter and CTO at werk21 GmbH (since 2000), with additional partner roles at werk21 Kommunikation GmbH, Schulerio Marketing KG, and Werkverlag KG. He leads the development of LAMP-based applications and Drupal CMS, and oversees Ubuntu-based server operations with a strong emphasis on IT security, Grundschutz, privacy, and information security. Based in Flensburg, Germany, he champions open-source strategies that enable public-sector and civil-society organizations to operate more transparently and securely. His work blends entrepreneurial leadership with hands-on engineering to deliver practical, auditable solutions in complex regulatory and security contexts. A distinctive trait is his long-standing commitment to open-source ecosystems and governance-focused IT that advances digital sovereignty beyond commercial software into the public-interest tech space.
8 years of coding experience
4 years of employment as a software developer
Github Skills (107)
cookie-consent10
consent-management10
mediasoup10
collaboration10
kurento10
cookie10
webrtc10
ccpa10
conferencing10
javascript9
docker-compose9
thunderbird9
gdpr9
dragonflybsd9
video-conferencing9
Programming languages (8)
Github contributions (5)
werk21/bigbluebutton
Jan 2021 - Jan 2024
Complete open source web conferencing system.
Contributions:1 push, 2 branches in 3 years
javascriptnodejsconferencingweb-conferencing
werk21/omniauth-bn-office365
Mar 2021 - Jun 2022
Contributions:1 release, 4 pushes, 1 tag in 1 year 2 months
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