Explore a novel approach to cloud-native platform engineering using functional programming in this Lambda Days 2024 conference talk by Łukasz Biały. Discover how to build production-grade infrastructure systems using the Scala SDK for Pulumi (codenamed Besom), leveraging Scala's type safety and functional features to enhance maintainability, safety, and correctness across your entire stack. Learn how this methodology enables functional programmers to dynamically deploy infrastructure segments on demand directly from their applications. The presentation demonstrates a complete functional approach to platform engineering, showing how to stay within the typeful confines of a functional programming language while constructing robust cloud infrastructure.