The controller responsible for data processing on this website within the
meaning of the General Data Protection Regulation (GDPR) is:
Liam Wittig
Tennesseeallee 28 D202
76149 Karlsruhe
Germany
Email: me@wttg.li
This website is hosted externally. When you visit the site, your browser automatically transmits certain technical data to the hosting provider, including your IP address, date and time of access, the URL requested, the amount of data transferred, and your browser type and operating system.
This data is used solely to ensure the technical operation of the website and is not combined with any other data sources. The legal basis is Art. 6(1)(f) GDPR (legitimate interest in the stable operation of the website).
This website uses Umami, a privacy-friendly web analytics
tool hosted on our own infrastructure at unami.wttg.li.
Umami collects the following information:
– Page URL visited
– Referring website (referrer)
– Approximate country of origin (derived from IP address; the IP itself is not stored)
– Browser type and operating system
– Device type (desktop, mobile)
Umami sets no cookies, stores no IP addresses, and collects no personally identifiable information. All data is fully anonymized and cannot be attributed to individual persons. No cross-site tracking takes place.
The legal basis is Art. 6(1)(f) GDPR (legitimate interest in anonymously analyzing website usage to improve the service). As no personal data is collected, no consent is required.
If you contact me by email, the data you provide (in particular your email address and the content of your message) will be processed for the purpose of handling your inquiry. This data will not be passed on to third parties without your consent.
The legal basis is Art. 6(1)(f) GDPR (legitimate interest in responding to inquiries) or Art. 6(1)(b) GDPR where your inquiry relates to the conclusion of a contract.
This website contains links to external services (GitHub, LinkedIn, App Store, Strava, Garmin Connect). When you follow these links, the privacy policies of the respective providers apply. I have no influence over their data processing.
You have the following rights regarding your personal data:
– Right of access (Art. 15 GDPR)
– Right to rectification (Art. 16 GDPR)
– Right to erasure (Art. 17 GDPR)
– Right to restriction of processing (Art. 18 GDPR)
– Right to data portability (Art. 20 GDPR)
– Right to object (Art. 21 GDPR)
To exercise your rights, please contact: me@wttg.li
You also have the right to lodge a complaint with a supervisory authority. The competent authority for Baden-Württemberg is the State Commissioner for Data Protection and Freedom of Information Baden-Württemberg.
June 2026