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My name is Maksim Zhirnov. I’m a Growth Marketing Expert & MarTech Engineer. I help tech companies scale through data-driven marketing strategies, powered by my engineering background. I love building marketing systems that drive growth and sharing insights on the intersection of technology and customer acquisition.
Unit Tests That Don't Block Refactoring: Writing Tests That Evolve With Your Code

Unit Tests That Don't Block Refactoring: Writing Tests That Evolve With Your Code

The Refactoring Paradox Nobody Talks About You’ve heard it a thousand times: “Write unit tests! They’re your safety net! They give you confidence to refactor!” And you know what? That’s absolutely true. Except when it’s not. There’s a peculiar moment in every developer’s career when they discover that their test suite—the very thing that was supposed to liberate them—has become a pair of concrete boots. You need to refactor a class, extract a method, reorganize your module structure, and suddenly half your tests start breaking....

February 17, 2026 · 10 min · 2119 words · Maxim Zhirnov
Junior Developers Should Not Touch Tests: A Provocative Case for Gatekeeping Quality

Junior Developers Should Not Touch Tests: A Provocative Case for Gatekeeping Quality

The Uncomfortable Truth Nobody Wants to Hear Let me start with something that will make your Twitter timeline combust: junior developers writing tests is like letting someone learn to drive by driving a school bus during rush hour. Sure, they’ll probably survive, and maybe even learn something. But is that really the best use of everyone’s time and sanity? I can already hear the collective gasp from the test-driven development zealots, the agile evangelists, and the “everyone should code review everything” crowd....

February 17, 2026 · 9 min · 1810 words · Maxim Zhirnov
What separates a strong senior engineer from a harmful “architecture philosopher”

What separates a strong senior engineer from a harmful “architecture philosopher”

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February 16, 2026 · 1 min · 2 words · Maxim Zhirnov
Code Ownership or Code Fiefdoms? When Responsibility Turns into Territory

Code Ownership or Code Fiefdoms? When Responsibility Turns into Territory

In medieval times, lords ruled their fiefdoms with an iron fist. They had absolute authority over their territories, decided who could enter, what could be built, and who could leave. Fast forward to the modern software engineering era, and you might find something eerily similar lurking in your codebase—except instead of castles and moats, we have pull requests, code reviews, and firmly guarded repositories. Code ownership is supposed to be a good thing....

February 16, 2026 · 13 min · 2675 words · Maxim Zhirnov
Side Projects That Actually Grow Your Skills Instead of Just Filling GitHub

Side Projects That Actually Grow Your Skills Instead of Just Filling GitHub

The GitHub Graveyard: Why Most Side Projects Fail Let’s be honest—your GitHub is probably littered with half-finished projects that seemed like brilliant ideas at 11 PM on a Tuesday. A repo with a README that says “TODO: add documentation,” three commits from last year, and approximately zero stars. We’ve all been there. The project started with enthusiasm, but somewhere between week two and month three, it quietly died on the vine....

February 15, 2026 · 10 min · 1948 words · Maxim Zhirnov