Kai is a Senior Software Engineer at Google AI, working on IR and NLP. Prior to that, he worked at Amazon Alexa and SAP. Kai took his Ph.D. from Max-Planck Institute for Informatics in Germany, where he worked on neural IR models and IR evaluation. His research interests focus on the developments of deep learning models for ad-hoc information retrieval and question answering. Kai co-authored peer-reviewed research papers and serves as program committee members, editorial board members, and reviewers for IR/NLP conferences and journals. For complete list of his publications, please check out his homepage or visit his Google Scholar page.