Dirk Holtwick
Owner at holtwick.it
Mülheim an der Ruhr, North Rhine-Westphalia, Germany
Summary
🤩
Rockstar🎓
Top SchoolDirk Holtwick is an independent software engineer and entrepreneur with 16+ years building native macOS/iOS apps and web platforms, currently running his own studio holtwick.it since 1999. A former Senior Software Developer and Tech Lead at Evernote, he brings deep experience in rich text editors, crypto, and cross-platform desktop and mobile development. Dirk is an early adopter and privacy advocate who contributes full‑stack work to open-source projects like a secure video group chat (briefing), where he implemented core UI features such as a QR code generator and STUN/sharing fixes. His background blends formal study in computer science and humanities with hands‑on product and CEO experience from founding spirito GmbH, giving him a pragmatic, user-focused approach to engineering. Based in Mülheim an der Ruhr, he favors Apple platforms and consistently ships polished, privacy-minded user experiences.
16 years of coding experience
15 years of employment as a software developer
History Italianistics, History Italianistics at Alma Mater Studiorum – Università di BolognaComputer Science History and Italianistics, Computer Science History and Italianistics at University of Duisburg-Essen
Italian, English, French, German
Stackoverflow
1,929reputation
548kreached
36answers
9questions
Github Skills (18)
javascript10
css10
sc10
scs10
vue10
html10
webrtc10
user-interface9
front-end-development9
websocket7
websockets-client7
websocket-client7
client-websocket7
iphone6
objective-c6
Programming languages (15)
Github contributions (5)
holtwick/briefing
Apr 2020 - Jan 2023
🔮 Secure direct video group chat
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:3 releases, 3 reviews, 642 commits in 2 years 9 months
Contributions summary:Dirk's commits primarily focus on the development of the front-end component, including adding the core QR code generator for the application. Further commits encompass integrating the release version, and making changes to enhance the app by modifying the appearance of the user interface, as well as including features such as the ability to set the video size. In addition, the user addressed issues such as the STUN protocol and the sharing functionalities. This indicates the user was involved in both UI and functionality.
webrtc-videowebrtce2eevuevideo
holtwick/briefing-signal
Mar 2020 - May 2020
Moved to
Contributions:29 commits, 9 pushes, 2 branches in 1 month
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