Explore the foundations and key features of Clojure, a functional and dynamic programming language targeting JVM, CLR, and JavaScript, in this 38-minute Devoxx conference talk. Discover how Clojure optimizes developer happiness and productivity through its powerful capabilities, including Software Transactional Memory (STM), functional programming paradigms, robust concurrency support with primitives and channels, and the innovative concept of transducers. Gain insights into real-world applications of these features and understand why Clojure has become a popular choice for developers seeking efficiency and joy in their programming experience.