Andrew Harmel-Law is an enthusiastic tech principal at Thoughtworks, where he specializes in domain-driven design, Java/JVM technologies, Agile delivery, build tools and automation, and organization design. Andrew's experience spans the software development lifecycle across many sectors, including government, banking, and ecommerce. What motivates him is the efficient delivery of large-scale software solutions to fulfill complex user needs, and he understands that people, architecture, process, and tooling all have key roles to play in achieving this. Andrew has a passion for open source software and its communities. He's been involved with OSS to a greater or lesser extent since his career began, as a user, contributor, expert group member, and paid advocate--most famously as one of the Jenkins Job DSL originators. Andrew enjoys sharing his experience as much as possible, in formal consulting engagements but also informally through mentoring, writing blog posts, speaking at and organizing conferences, and open-sourcing his code.