Tatzya Holovachenko is a high-level executive at UniExo, holding the positions of Chief Technology Officer and machine learning specialist. She has expertise in the field of machine learning, which is a type of artificial intelligence that trains computer systems to learn from data and make decisions with minimal human intervention. Tatzya attended Kyiv Polytechnic Institute, a renowned technical university located in Kiev, Ukraine. Further details about her background or contributions to UniExo are not provided in the given text.