Allen Holub is an internationally recognised Agile-transformation consultant and software architect. He speaks internationally about these topics and agile-friendly implementation technology (like microservices) and architecture.
He provides in-depth consulting and training in those areas. He excels at building highly functional Lean/Agile organisations and designing and building robust, highly scalable software suitable for agile environments. He's worn every hat from CTO to grunt programmer and is an expert-level programmer in many languages and platforms.
Allen is widely published. His works include 10 books, hundreds of articles (in publications ranging from Dr. Dobb’s Journal to IBM DeveloperWorks), and video classes for agilitry.com (Agility with Allen), Pluralsight (Swift in Depth, Picturing Architecture, Object-Oriented Design), O’Reilly (Design Patterns in the Real World) and forthcoming on Lynda/LinkedIn.