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I publish hands-on tutorials for QA engineers and technical professionals who want a deeper understanding of mobile apps—from automation and debugging to traffic analysis and security testing.
Apple Silicon · Jun 2, 2026
An update on Apple Silicon virtualization: Parallels Desktop, VMware Fusion Pro, UTM, VirtualBox, macOS VMs, Windows 11 ARM, Linux ARM, and the reality of x86 emulation.
Linux · Jun 2, 2026
A practical guide to Linux installers: Calamares, Ubiquity, Subiquity, Anaconda, Debian Installer, YaST, Agama, archinstall and manual installation.
Raspberry Pi · Jun 1, 2026
A practical guide to choosing the best retro gaming distribution for Raspberry Pi, including RetroPie, Recalbox, Batocera and Lakka.
Build reliable automation frameworks and practical QA workflows.
Instrumentation, debugging, and stable mobile test strategy.
Inspect and analyze app traffic for behavior and regressions.
Security testing fundamentals for QA and technical learners.
Hands-on lab environments for experiments and repeatable learning.
Hands-on workshops for Appium, Android traffic analysis, Charles Proxy, Frida, Objection, and QA automation workflows.
View coursesI’m Dmitry Yarygin, a QA engineer, educator, and technical content creator focused on practical mobile testing, automation, Android debugging, and security-oriented QA workflows.
Read about me