Hi there 👋

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.
The Paradox of AI Code Reviews: When Helpful Feedback Becomes a Toxic Pressure Cooker

The Paradox of AI Code Reviews: When Helpful Feedback Becomes a Toxic Pressure Cooker

The Illusion of the Helpful Robot Reviewer You know that feeling when someone tells you your code is bad, but in the most professional way possible? Like receiving criticism from a robot dressed in business casual—all neutral tone, zero judgment, maximum sting. Welcome to the world of AI-powered code reviews, where we’ve somehow managed to make feedback simultaneously less emotionally taxing and infinitely more pressurizing. It’s the software development equivalent of discovering that your workout buddy is now a relentless AI overlord who never gets tired....

October 29, 2025 · 11 min · 2218 words · Maxim Zhirnov
Building a Customer Churn Prediction System with XGBoost: From Zero to Production

Building a Customer Churn Prediction System with XGBoost: From Zero to Production

You know that sinking feeling when you realize your favorite customer just walked out the door? Turns out, there’s a way to see them leaving before they pack their bags. Welcome to the wonderful world of churn prediction, where data science meets business survival instincts. In this deep dive, I’ll take you through building a robust customer churn prediction system using XGBoost. We’re not just talking theory here—this is the practical stuff that actually works in production....

October 28, 2025 · 8 min · 1561 words · Maxim Zhirnov
Why Your Obsession with Code Minification is Overrated

Why Your Obsession with Code Minification is Overrated

Remember when everyone thought adding !important to every CSS rule was the way to go? Or when we all genuinely believed that document.write() was peak JavaScript? Well, friends, I think we’ve collectively found our next sacred cow to worship: code minification. And I’m here to gently nudge it off the pedestal. Don’t get me wrong—minification has its place in the performance optimization toolkit. But somewhere between “totally ignore it” and “treat it like the holy grail of web performance,” we’ve collectively decided that minification deserves our obsessive attention....

October 28, 2025 · 8 min · 1654 words · Maxim Zhirnov
Building a User Flow Analysis and Optimization System for Web Applications

Building a User Flow Analysis and Optimization System for Web Applications

The Mystery of the Disappearing Users We’ve all been there. You launch your carefully crafted web application, the design looks pristine, the features are solid, and then… users start vanishing like morning dew. Not because your app is bad, but because somewhere between point A and point B in their journey, they hit a wall, got confused, or just decided to grab coffee instead. The tragic part? You never really knew where they dropped off or why....

October 27, 2025 · 13 min · 2608 words · Maxim Zhirnov
The Case Against Always Using Design Patterns

The Case Against Always Using Design Patterns

You know that feeling when you’re at a buffet and you fill your plate with everything because it’s all available, then realize halfway through that you should’ve just stuck with the pizza? That’s basically what happens when developers discover design patterns. Don’t get me wrong—I love design patterns. They’re like a well-organized toolkit for solving recurring problems. But here’s the uncomfortable truth that nobody wants to admit at tech conferences: design patterns have become the duct tape of modern software development....

October 27, 2025 · 9 min · 1708 words · Maxim Zhirnov