This site collects as little as possible.
- Contact form. When you send the form, your name, email, company and message are stored by Netlify, which hosts this site, and forwarded to HASHJOIN by email. They are used only to reply to you and are never sold or shared for marketing.
- Where you came from. The form also records the page that referred you (for example, mogilevskiy.dev), so we know which links work.
- Newsletter. If you subscribe to HASHJOIN Field Notes, your email address is stored by Buttondown, which sends it. Links in each issue go through Buttondown so we can count which ones get clicked, and they carry
utm_tags naming the newsletter as the source. Emails contain no open-tracking pixel. Every issue has an unsubscribe link, and unsubscribing removes you from future sends. - Candidates interviewed for the Pager Test. When a client engages HASHJOIN to interview a candidate, the resume, interview notes and written assessment are shared only with that client. Interviews aren't recorded, notes cover job-related evidence only, and all of it is deleted 90 days after the assessment is delivered. Candidates can ask for deletion sooner through the contact form.
- No tracking on this site. There are no analytics scripts, advertising pixels or tracking cookies on hashjoin.com.
- Fonts. Pages load the IBM Plex fonts from Google Fonts, so Google receives your IP address when you visit.
- Deletion. To have your messages deleted, ask through the contact form.
Last updated October 2026.