Maarten Grootendorst is a Developer Relations Engineer at Google DeepMind and the creator of popular open-source tools, including BERTopic and KeyBERT. Drawing on three master's degrees across psychology and data science, his technical writing breaks down complex AI concepts for millions of readers globally. He is also the co-author of the best-selling book Hands-On Large Language Models and the upcoming book An Illustrated Guide to AI Agents.