Guilherme Vargas

Experience

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  Universidade Federal de Ouro Preto

  Nov 2016 - May 2017

  Student Internship

  As an intern in a partnership between UFOP and VALE, I worked on developing deep learning algorithms to detect cracking in railroad ties. My role involved researching and implementing neural network-based techniques to enhance defect detection accuracy. I contributed to designing and training models for automated crack identification, optimizing their performance for real-world applications. This project aimed to improve maintenance efficiency and safety in railway infrastructure by leveraging AI-driven inspection methods. Show less

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  Zanthus - Tecnologia de Resultados

  Mar 2021 - May 2023

  PHD Researcher

  As a PhD Researcher in a partnership between Zanthus and Unicamp, I was responsible for developing a cutting-edge recommender system based on diffusion models to enhance prediction accuracy and personalization. My research focused on generative AI and probabilistic modeling to improve the robustness of recommendations. I designed and implemented scalable machine learning pipelines, optimizing their performance for real-world applications. Additionally, I collaborated with interdisciplinary teams to integrate novel algorithms into practical systems. Show less

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  NEOS TECNOLOGIA

  May 2023 - Mar 2025

  Data Scientist

  As a Data Scientist, I design and develop AI-powered solutions that enhance automation and decision-making. I have built a chatbot based on Retrieval-Augmented Generation (RAG) using LangChain, Streamlit, and Flask to provide intelligent and context-aware responses. Additionally, I developed a multi-agent system chatbot capable of answering complex database-related queries, improving efficiency in data retrieval and interaction. All these solutions were deployed as dockerized microservices and orchestrated using Kubernetes, ensuring scalability and reliability in production environments. Currently, I am leading the development of a sentiment analysis system based on Google Maps reviews, leveraging natural language processing techniques to extract actionable insights from user feedback. Show less

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  Semantix

  Mar 2025 - now

  Senior Data Scientist