1. Controller
The controller within the meaning of the General Data Protection Regulation (GDPR) is:
Oliver Bühler Contact: via the contact form
2. Data Collected
2.1 Contact Form
When you use the contact form, the following data is collected:
- Name (required)
- Email address (required)
- Subject (required)
- Message (required)
This data is used exclusively to process your inquiry.
2.2 Web Analytics (Google Analytics 4)
This website uses Google Analytics 4 (GA4) only with your explicit consent via the cookie banner. No analytics data is collected without consent.
When consent is given, the following data is processed:
- Pages visited and time spent
- Approximate location (country/region)
- Device information (browser, operating system)
- Referrer URL
3. Purpose of Processing
| Data | Purpose | Legal Basis |
|---|---|---|
| Contact form | Processing professional inquiries | Art. 6(1)(b) GDPR (pre-contractual measures) |
| Google Analytics 4 | Website improvement | Art. 6(1)(a) GDPR (consent) |
4. Retention Periods
- Contact form data: 6 months after the communication is concluded, then deleted
- Google Analytics 4: Per GA4 default settings (event data: 2 months, user data: 14 months)
5. Your Rights (Art. 15–21 GDPR)
You have the following rights regarding your personal data:
- Access (Art. 15 GDPR): Right to obtain information about stored data
- Rectification (Art. 16 GDPR): Right to correct inaccurate data
- Erasure (Art. 17 GDPR): Right to have your data deleted
- Restriction (Art. 18 GDPR): Right to restrict processing
- Data portability (Art. 20 GDPR): Right to receive your data in a machine-readable format
- Objection (Art. 21 GDPR): Right to object to processing
To exercise your rights, please contact me via the contact form.
You also have the right to lodge a complaint with a data protection supervisory authority.
6. Third-Party Services
| Service | Provider | Location | Purpose | Transfer |
|---|---|---|---|---|
| Google Analytics 4 | Google LLC | USA | Web analytics | Consent-based only; Standard Contractual Clauses (SCC) |
| GitHub / GitHub Pages | Microsoft Corporation | USA | Source code hosting | Technically necessary; SCC |
| AWS (Amazon Web Services) | Amazon Web Services, Inc. | USA | Backend infrastructure (contact form) | Technically necessary; SCC |
For transfers to the USA, the EU Commission's Standard Contractual Clauses serve as an appropriate safeguard pursuant to Art. 46 GDPR.
7. Cookies and Consent
This website uses cookies only with your consent via the cookie banner. No technically necessary cookies are set.
You can withdraw your consent at any time by reopening the cookie banner or adjusting your browser settings.
8. Changes to This Privacy Policy
This privacy policy may be updated as needed. The current version is always available on this page.
Last updated: 2025