Martijn Jansen works as a Data Scientist within Rabobank. Working within the biggest GenAI team within the bank, he has considerable knowledge about Large Language Models and how to evaluate those. Initially, Martijn focused on implementing Retrieval Augmented Generation, and he has since shifted his attention to evaluating chatbots. Martijn studied Computer Science at Utrecht University, with a focus on algorithms, optimization and machine learning. Outside of work, Martijn enjoys playing volleyball and going to the cinema.