Marcin Moskała

Consultant, contractor, trainer, author of six books about Kotlin

Marcin Moskała is a Kotlin Google Developer Expert and official JetBrains training partner. A hands-on developer at heart, he turns complex language features into clear mental models that teams can apply on their very next pull request. Marcin is the author of Kotlin Essentials, Functional Kotlin, Kotlin Coroutines: Deep Dive, Effective Kotlin: Best Practices, Advanced Kotlin, and, in Polish, JavaScript od podstaw and Python od podstaw, as well as Android Development with Kotlin. He also runs the largest Medium publication devoted to Kotlin and speaks regularly at conferences such as Droidcon and Kotlin Conf, where his sessions are praised for their clarity and real-world relevance.

Structured Concurrency: The paradigm shift that changes modern development

For decades, concurrent programming has meant wrestling with complexity, resource leaks, and stray processes. Structured Concurrency presents a paradigm shift, changing how we write, read, and reason about concurrent code. This session cuts through the hype to reveal the core principle: concurrent tasks should have a clear beginning, end, and scope, just like any other code block. We'll explore how this simple idea leads to a powerful new reality where tasks are organized into clear hierarchies. Discover how this structure enables automatic, reliable cancellation—if one task fails or is cancelled, its entire family of related tasks is gracefully cleaned up. Join us to see how this paradigm, now being adopted in languages from Java to Kotlin and beyond, makes concurrent code robust, readable, and easier to manage than ever before.

Understanding Compose modifers and how their order effects UI

Time to finally understand how modifiers work in Jetpack Compose, to use them consciously, instead of just trying different order until it looks fine, and to prevent order-related mistakes. This presentation gives a deep explanation of modifiers and how they work, and it presents a formula for winning famous Jetpack Compose Modifier Guessing Game! Related with Modifier Guessing Game https://kt.academy/article/game-modifier-guesser