What does it really take to scale companies to millions of users? In this episode of Fixing the Game, Luke sits down with Irina Scarlat, a seasoned growth leader who helped scale some of Europe’s most disruptive companies including Uber, Revolut, and Bitpanda. Today she is CMO at Improbable and a growth advisor to fast-growing tech companies. Irina has spent her career building and optimizing growth engines—from launching global brands in new markets to designing scalable acquisition and retention systems. In this conversation, she breaks down the principles, frameworks, and mindset behind sustainable growth. A central theme of the episode is Irina’s definition of growth: a scientific process of problem solving. Growth, she explains, sits at the intersection of product, marketing, and data—and successful teams treat it as a structured, iterative discipline rather than a creative guessing game. Luke and Irina explore how to diagnose growth challenges by analyzing the full funnel—from acquisition and conversion to retention and monetization—and why understanding the root cause of a problem is essential before trying to fix it. They also dive into one of the most overlooked concepts in growth: product–channel fit. Even great products fail to scale if they rely on the wrong channels at the wrong stage. Irina explains how companies should prioritize owned channels first, then earned, and only later paid channels, once product-market fit and traction are clear. Another key lesson: growth rarely comes from dozens of channels working at once. Instead, the most successful companies focus on a few channels that work exceptionally well, then expand as the product and market mature. Irina also shares tactical examples from her time at Uber and Revolut, including early-stage strategies that many companies overlook today. These include “things that don’t scale”—such as community meetups, user dinners, and direct engagement with early customers. While these tactics aren’t scalable long term, they often create the foundation for word-of-mouth, network effects, and exponential growth. Beyond tactics, the episode explores what separates good growth teams from great ones. Irina discusses how she builds high-performing teams and why talent density, ownership, curiosity, and resilience matter more than specific skills. Finally, the conversation turns to a topic rarely discussed in growth: discipline. According to Irina, consistent execution and the willingness to show up—even when it’s hard—are often the real difference between success and failure. In this episode, you’ll learn: Why growth is fundamentally a scientific problem-solving processHow to diagnose growth challenges across the entire funnelThe importance of product–channel fit and choosing the right channels at the right stageWhy most companies succeed with only a few high-performing channelsHow early-stage tactics that don’t scale can unlock massive growth laterThe difference between a channel problem and an execution problemHow to build and lead high-performing growth teamsWhy discipline and consistency are underrated growth advantagesIf you’re building a startup, leading marketing, or trying to unlock new growth levers in your business, this episode is packed with practical insights from someone who has scaled some of the most iconic fintech and mobility brands in the world. Enjoy the conversation.
