Jens Gaulke is a computer scientist who has worked in information security at Arvato Systems for more than a decade, focusing on information security management, business continuity management, ISO standards, cloud computing, and AI. He also leads the company’s security awareness training. Before that, he spent 14 years teaching programming, game development, networking, databases, IT security, and software engineering at bib International College in Paderborn, Germany. His books cover game programming, machine learning, cryptography, and computer science—always in Python, and always with a focus on practice.