Christian Baranowski is a project manager and software architect with SEITENBAU, a midsized (120 employees) web agency, software development company, and IT service provider. SEITENBAU's core areas of expertise are web development, deployment and customization of content management systems, the development of enterprise and employee portals, as well as customer-specific software development. Christian leads a team of developers, and he describes his role at SEITENBAU as an agile developer and tester. He has blogged and spoken at a wide variety of conferences on web development, OSGi, and testing. When he is not working, you'll find him spending time with his wife, son, and daughter.

Tim Perry is a technical lead and the open source champion at Softwire (a bespoke software development company in North London). By day, he is guiding teams, building a variety of great software at every scale for his clients, and pushing Softwire to engage with and give back to the wider software development community. He works with a huge range of tools daily, from Java, Spring, and JUnit to JavaScript web components and SQL analytics engines.

By night, he's a frequent technical speaker, and a prolific open source contributor to a huge variety of projects, including JUnit, Mockito, Knockout, and Lodash, and some of his own, such as loglevel and grunt-coveralls. Tim is feverishly keen on all things related to automated testing, polyglot persistence, as well as good, old-fashioned, high-quality software development.

Gualtiero Testa is a software analyst, architect, and developer involved in Java enterprise-level web applications, mainly in the banking, health, and government agencies' domain.

His main interests are Test-driven Development (TDD), testing tools and methodologies, and everything related to code quality. He can be reached through his blog at http://www.gualtierotesta.it/. He lives in Pavia, Italy.