Denis Yurchak is an independent software builder whose products include Yadaphone, eSIMPal and browser-based learning tools. He shares practical material on running coding agents and deploying small web products.[1][4]
Start with Claude VPS Setup Prompt →
Education
Studies in Economics; degree not established
Jul 2020 – end date unverified
[6]Links
Website
GitHub 
X · denisyurchak Consultant Software Engineer · Denis Yurchak
Career
Yurchak’s owned portfolio spans browser calling, travel connectivity, language learning and spaced repetition. His professional profile records backend work at Fiskaly, engineering at Brevo, a founding-engineer role at Collab Clique and an earlier data-science internship. His current portfolio emphasizes building and operating his own products.[1][6]
Contributions
Turn server setup into a reviewable sequence
His VPS setup prompt guides an agent through configuring Ubuntu 24.04 on Hetzner. It asks for a username and SSH key, then covers a separate administrator account, key-only authentication, disabling root login, fail2ban, a restrictive UFW firewall and unattended security updates. Tailscale is optional. The repository explicitly tells readers to inspect the prompt before handing it to an agent. These are proposed configuration steps, so the resulting server still needs verification.[4][5]
Keep a learning tool’s data on the device
His browser Anki project implements SM-2 spaced repetition, imports .apkg decks and stores the deck on the user’s device. It offers a concrete example of a product that works without an account, alongside his paid communication services.[1]
Tools, writing & talks
Tools
Start here
Claude VPS Setup Promptgithub.comAn interactive server-setup prompt covering accounts, SSH, firewalling and optional private networking.
Read the entire prompt before applying it to a new server. It assumes Ubuntu 24.04, SSH access and an understanding of account and firewall changes; verify each generated change before closing the existing session.
Repository owner[4]Original source
Writing, research & talks
- Product portfoliodenisyurchak.com
Original descriptions of Yadaphone, eSIMPal, browser Anki and other products.
Builder and operator[1]