Jeff Walker “Code Ranger” is a passionate software craftsman and team leader with more than fourteen years experience. He’s been interested in programming language design and innovation since college when he created his own language based on Scheme. Recently, he’s learned Rust, attend and spoken at the Columbus Rust Society, spoken at the Columbus Rationality meetup and is designing a new language “Adamant” ( His blog at has a popular series of posts about JavaScript and transpiled languages like CoffeeScript.