Benjamin Obando
Machine Learning Engineer @Meta
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WORK HISTORY
Machine Learning Engineer @Meta
Software engineer focused on interest-based recommendations for Facebook, contributing to projects across ranking and retrieval. Leddocumentation and knowledge-sharing initiatives, served as the point of contact for cross-functional teams and Legal• [Ranking] Developed and tested 70+ new Interest based features for ranking models, improving model offline metrics by >0.1% in se-veral events while maintaining capacity constraints• [Ranking] Developed and tested new interests based architectures in the main ranking model using Pytorch leading to an increase inby >0.1% in several events• [Retrieval] Launched a 0.25%, while improving content freshness by 1.43%post-score normalization mechanisms, increasing interest coverage for VPV by 0.29% and for engagement by• [Retrieval] Integrated marketplace engagement using product descriptions and LLMs resulting in a generator with 0.6% vpv increaseover baseline• Led the development and updates of Digital Services Act compliance system cards. Non compliance with the DSA could cost the com-pany 5% of revenue in fines.• Resolved 4 site events by optimizing pipelines, restoring data consistency, and improving debugging efficiency, reducing compute usage by 83% on the team\'s most expensive pipeline and enhancing system stability
EDUCATION
Universite de Lorraine
Doctor of Philosophy - PhD, Applied Mathematics
Universidad de Chile
Doctor of Philosophy - PhD, Applied Mathematics
Universidad de Chile
Engineer's degree, Applied Mathematics
ABOUT BENJAMIN OBANDO
I am an engineer in applied mathematics with a passion for using deep mathematical reasoning to solve complex problems. My areas of expertise include data science, machine learning, mathematical modeling, numerical simulation, portfolio theory, and behavioral finance.With over 4 years of experience in data science and machine learning, I have successfully completed projects for Mining, Banking, and Technology companies. These projects involved handling large volumes of private and public data. In addition, I have collaborated on projects with teams, delivering high-quality results within strict deadlines. My strong interpersonal, written, and oral communication skills have allowed me to effectively communicate complex scientific and mathematical concepts, including presenting findings to executive teams and writing technical reports for clients.
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