Lewis Tunstall is a machine learning engineer at Hugging Face, where he develops tools for the NLP community and teaches people to use them effectively. Over his career he has built machine learning applications for startups and enterprises across domains including natural language processing, topological data analysis, and time series.

Lewis is a co-author of Natural Language Processing with Transformers, an O’Reilly book written with Leandro von Werra and Thomas Wolf that has become a go-to guide for training, fine-tuning, and deploying transformer models. Through the book, open source contributions, workshops, and talks, he helps practitioners move from reading papers to shipping real NLP applications.

His route into machine learning ran through science: Lewis holds a PhD in theoretical physics and has held research positions in Australia, the USA, and Switzerland. That background in rigorous problem solving now informs his mission of making state-of-the-art NLP accessible to engineers, researchers, and data scientists around the world.