Crafting robust and scalable applications in the modern software landscape requires a blend of advanced techniques and cutting-edge tools. In this talk, Madona will guide attendees through building resilient systems, focusing on leveraging Kotlin's expressive syntax, powerful testing capabilities, and scalability features. This talk explores how Kotlin enables the design of resilient, testable, and scalable applications. Attendees will learn how to leverage Kotlin’s expressive language features, apply effective testing strategies, and implement scalability principles that maintain high code quality in modern software systems.