Privacy policy

Maciej Tomaszewski runs this site and is the data controller for anything described here. You can reach me at [email protected].

Nothing. There is no contact form, no account and no newsletter. The site doesn’t ask for your name, e-mail address or any other personal data.

The theme you can set in the navigation bar is saved in your browser only (localStorage) so the site remembers it on your next visit. The language you pick is saved in a cookie for the same reason. None of this leaves your device. Analytics is separate and runs only after you agree, as described below.

I host the site with Vercel Inc., which builds it and serves every page from its servers and edge network. Traffic to the domain first passes through Cloudflare, Inc., which runs its DNS and a proxy in front of Vercel. As with any website, each request you make reaches them with technical data: your IP address, the page you asked for, your browser’s user agent and the time. They use it only to deliver the page and protect it from abuse, and keep it in short-lived server logs. I don’t use those logs to identify anyone or combine them with analytics.

Both companies process this data on my behalf as processors and may do so in the United States. Vercel Inc. and Cloudflare, Inc. are certified under the EU-US Data Privacy Framework, which the European Commission recognises as providing adequate protection. The legal basis is my legitimate interest in running a working, secure site (art. 6(1)(f) GDPR).

When you write to me, your message and the address it comes from land in my Gmail mailbox, which is provided by Google. Google processes the message as my mail provider and may do so outside the European Economic Area under the standard contractual clauses approved by the European Commission. I use what you send solely to reply to you.

The legal basis is your own initiative in contacting me (art. 6(1)(b) and (f) GDPR). I keep the conversation for as long as it is relevant, and no longer than 12 months after the last message unless we start working together and the law requires me to keep records longer.

You can ask me at any time what I hold about you, ask me to correct or delete it, or object to how I use it. Write to the address above. You can also complain to the Polish data protection authority (UODO).

With your consent, and only then, the site runs two analytics tools: Google Analytics 4, provided by Google Ireland Ltd, and Microsoft Clarity, provided by Microsoft Ireland Operations Ltd. Both are loaded through Google Tag Manager. Until you click "Accept", none of their scripts load and no tracking cookie is set. The site asks before anything else and works the same whichever you choose.

Google Analytics counts visits and tells me which pages people read, where they come from and what they click, such as the e-mail and LinkedIn links. It sets the cookies _ga and _ga_ followed by an identifier, which hold a random id for up to two years. I haven’t enabled advertising features. Google keeps event-level data for 14 months.

Microsoft Clarity records how a page is used: where people click, how far they scroll and, as an anonymised replay, how they move through it. Text you type is masked before it leaves your browser. It sets the cookies _clck (up to a year) and _clsk (one day); Microsoft keeps recordings for 30 days and heat maps for 13 months. Clarity also sets cookies on its own domain, clarity.ms, which this site can’t delete; you can remove them in your browser.

Both providers may process this data in the United States. Google LLC and Microsoft Corporation are certified under the EU-US Data Privacy Framework, which the European Commission recognises as providing adequate protection. The legal basis is your consent (art. 6(1)(a) GDPR).

Your decision is stored in your browser (localStorage, key "consent") so the site doesn’t ask again. You can change it at any time with the "Cookies" link in the footer; withdrawing consent reloads the page without either tool and deletes the cookies they set on this site. You can also delete them yourself in your browser settings.