Creator of MarianNMT. Principle Research Scientist for Microsoft Translator since 2018. His main research interests are neural machine translation, automatic post-editing and grammatical error correction. Before joining Microsoft, he was an Assistant Professor at the Adam Mickiewicz University in Poznan, Poland, and a visiting researcher in the MT group at the University of Edinburgh. He also collaborated with the World Intellectual Property Organization and the United Nations, helping with the development of their in-house statistical and neural machine translation systems.