Sergio gutiérrez

I've built production AI systems for Walmart México through Axity, including a semantic product-matching platform that compares millions of products against competitor catalogs. I fine-tuned a multilingual embedding model for Spanish product data, improving precision by 15% and recall by 20%, and built a Milvus-based ANN search service that cut matching time from over 30 hours to about 15 hours. I've also delivered student-retention and shelf-stockout prediction models at Enki, sales forecasting and NLP pipelines for Walmart, and census data products at INEGI, where I led a five-person team and reduced a dissemination pipeline's processing time by 80%. My work spans Python, machine learning, RAG, vector databases, FastAPI, cloud deployment, and remote collaboration with international teams.