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Julio César

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Co-Founder & CEO at Fastfold, building AI agents for biotech and pharma. ⚛️ Lead Engineer at Thirdway Health, where I lead a small team scaling voice agents for medical practices. M.Sc. in Biomedical Engineering at Uniandes 🔬 researching in AI Drug Design with small peptides.

Before that, I worked at Globant as a Python/Bioscientist, where I was part of the founding team of the Life Sciences Studio. My work included developing medical imaging with Nvidia Clara 🩻 for hospitals, and collaborating with Verily (an Alphabet company) on a FHIR implementation for Clinical Pathways.

Essays

  • The return of time, AI and science
  • Research

    Data Federation in Healthcare for Artificial Intelligence Solutions
    J Castellanos, G Raposo, L Antunez

    - [Code]- [Slides]

    Near Real-Time Telemetry of Nation-Wide ICU’s Capacity Strain in Argentina
    G Raposo, J Castellanos, H Hernandez

    A flexible AI pipeline for medical imaging in a radiology workflow
    L Antunez, J Castellanos, G Raposo, C Murga M.D.

    Poetry

    Code

    Improvements to run OpenFold with re-trained weights for AlphaFold2 and parallelized with 🐳 Docker and Local Notebook for interactive inference and metrics visualization for PLDDT and PAE. Local inference Notebook here. Reference: Nature Methods

    voyager-bot is a fun Arduino bot controlled from a web browser using Nodejs on Docker for Raspberry pi with live cam streaming. Won 1st and 2nd place in the Oklahoma State University's 2016 Mercyry Robotics Challenge. Slides

    © 2025 by Julio César. with ❤️
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