I am Juan Francisco Lebrero, an AI enthusiast dedicated to exploring how artificial intelligence can transform our reality. Currently, I am an NLP Scientist at Mercado Libre within the LLMs team, where I focus on training, fine-tuning, and distilling Large Language Models to drive direct impact across the ecosystem. Simultaneously, I am pursuing a B.Sc. in Artificial Intelligence Engineering at the University of San Andrés (UdeSA), where I delve into the frontiers of this discipline.

A Journey through Innovation

In my current role at Mercado Libre, I work on:

  • Training, fine-tuning, and distilling LLMs with direct impact on products and users.
  • Designing data architecture, metrics, and evaluations to ensure robust, scalable, and high-quality models.
  • Building and evolving the large-scale AI model training and serving platform.

Additionally, as a Research Assistant at LiNAR, I focus on one of the most compelling applications of computer vision: the non-invasive assessment of embryos in IVF processes, developing models to predict viability using advanced time-lapse imaging techniques.

I also contributed to the data science efforts at SOFLEX, where we faced the challenge of processing and understanding human language within the context of public safety. I directed the training of language models tailored to Argentine Spanish and the development of intelligence platforms that analyze millions of incidents in real-time.

My experience also spans the industrial and educational sectors. At Papelera San Andrés de Giles, I implemented multimodal vision systems for product detection. At UK University Mexico, I led the AI strategy to optimize educational content production. Previously, at Notimation, I explored agent orchestration and RAG systems to streamline human-information interaction.

Perspective and Tools

I view programming and model design as essential tools for solving complex problems. I move fluently between languages such as Python, C/C++, and CUDA, building solutions on modern cloud infrastructures and databases. My academic background has allowed me to specialize in NLP, Computer Vision, and generative models, always with a practical focus.

Beyond code, I enjoy the challenges of competitive programming and constant innovation. I have had the honor of qualifying for the ICPC regionals and being recognized in various technical competitions—milestones that reflect my commitment to excellence and continuous learning.

Contact

If you would like to discuss technology, research, or potential collaborations, please feel free to reach out: