Junior Koch Email & Phone Number

As a seasoned professional in the field of data science, I currently hold the position of Principal Machine Learning Scientist and Data Scientist at Elo7 and enjoei. Here's a glimpse of my significant contributions and accomplishments:- Innovated non-conventional ranking models (Learn to Rank) for our search engines, resulting in a remarkable 10% boost in search revenue.- Spearheaded efforts to enhance Elo7's confidence and rigor in online experimentation (AB testing) by conducting seminars for cross-functional teams, including engineering and product.- Developed an intuitive application leveraging the bootstrap method, allowing teams to seamlessly perform hypothesis testing for online experiments.- Employed Large Language Models (LLM) and Vision Transformers (ViT) to create a recommendation module that improved user experience and engagement.- Pioneered the development of an application that enhances the interpretability of our search engines, utilizing Convolutional Neural Networks (CNN) and Long Short-Term Memory (LSTM) for text data with the utilization of Integrated Gradients.- Employed extensive Shapley Values to improve interpretability in the context of search engines and user intent.- Combined the power of Shapley Values with Generative Adversarial Networks (GANs) to create product purchase explanations.- Engineered a solution based on feature extraction with topic modeling (LDA, NMF, and SVD) to bridge the semantic gap between product supply and user demand at Elo7.- Designed and implemented a complex pipeline for product classification, harnessing techniques like semantic graphs, BM25 similarity, and Bayesian Optimization.- Contributed to the development of recommender systems, employing collaborative filtering, content-based, and hybrid approaches.I hold a Ph.D. in Materials Science and Engineering from Universidade Federal de Santa Catarina, and I previously worked as a Post-Doctoral researcher in Quantum Gravity at Universidade do Estado de Santa Catarina. Before transitioning to the data science field, I enjoyed a fulfilling career as a professor for five years.My professional interests encompass a deep passion for all things related to machine learning and artificial intelligence. I have a profound appreciation for mathematics and enjoy sharing my knowledge through teaching and continuous learning.Feel free to reach out if you'd like to connect or explore potential collaborations in the exciting realm of data science and AI.

Listed skills include Matlab, Python, Microsoft Office, Latex, and 10 others.