Gabriel Diaz de Leon

Gabriel Diaz de Leon

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AI Technical Lead | LLM Eval & Code Quality | Human Centered AI Systems | Computational Neuroscience PhD
Mexico City, Mexico

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Jobs verified_user 0% verified
  • Google via Qualitest Group
    AI Quality Lead
    Google via Qualitest Group
    Aug 2025 - Current (1 year 3 months)
    Led evaluation and quality initiatives for emerging LLM functionality, managing contributor workflows and developing scalable methodologies for reliable AI system assessment.
    • Led a team of 10 Search Language Specialists (SLS) in evaluating and improving novel LLM functionality using Python-based workflows
    • Designed and standardized quality assurance methodologies to improve consistency, reliability, and operational efficiency within a rapidly evolving AI evaluation environment
    • Coordinate technical strategy across multiple concurrent initiatives, balancing stakeholder priorities, delivery timelines, and model quality objectives
    • Conduct prompt engineering, workflow optimization, and output analysis to improve LLM be
  • G
    Technical Lead
    G Studio
    Feb 2025 - Current (1 year 9 months)
    Leading development of Human Digital Twin systems integrating wearable biometrics, cognitive modeling, and machine learning to estimate real-time athlete performance and cognitive state.
    • Led cross-functional AI development efforts from concept through MVP creation, guiding technical contributors and master’s students in model development and experimentation
    • Designed biometric modeling systems combining wearable heart rate data with cognitively challenging behavioral measurements to estimate functional performance in real time
    • Developed cognitive state estimation frameworks leveraging survey data, behavioral signals, and conversational LLM interactions to model cognitive condition evolution
    • Designed integrative ev
  • G
    AI Systems Engineer
    G Studio
    Oct 2024 - Jun 2025 (9 months)
    Designed and implemented a Retrieval-Augmented Generation (RAG) chatbot system to improve customer engagement and automate intelligent website interactions.
    • Built a RAG-based conversational AI system using OpenAI APIs, LangChain, and ChromaDB to support customer engagement workflows
    • Engineered prompt and response templates aligned with company communication policies, improving response quality, consistency, and privacy handling
    • Increased user engagement by 50% as measured by customer contact conversions relative to website traffic
    • Implemented document retrieval and contextual response pipelines to improve relevance and interaction quality
    • Collaborated across technical and business stakeholders to align AI
  • Instituto de Fisiología Celular
    Teaching Assistant
    Instituto de Fisiología Celular
    Jan 2020 - May 2022 (2 years 5 months)
  • Universidad Nacional Autónoma de México UNAM
    Graduate Researcher, Computational Neuroscience
    Universidad Nacional Autónoma de México UNAM
    May 2018 - Aug 2024 (6 years 4 months)
    Conducted computational neuroscience research focused on neural population dynamics, decision-making systems, and biologically plausible modeling, contributing to publications in PNAS and Nature Communications.
    • Applied statistical modeling, probabilistic analysis, and dimensionality reduction techniques to study neural encoding and decision-making processes
    • Analyzed electrophysiological and behavioral datasets to characterize neural population dynamics and sensory categorization mechanisms
    • Developed and evaluated biologically plausible neural network architectures for comparison against experimental neural activity data
    • Designed data processing, visualization, and analysis pipelines using Python and MATLAB for re
  • Northwestern University
    2016 NIDA Research Fellow
    Northwestern University
    Jun 2016 - Jan 2017 (8 months)
    Conducted social interviews for data collection from the Young Men who have Sex with Men (YMSM) community, tested participants for HIV following city and state protocols, and analyzed collective data from study to test correlations between social factors and drug abuse.
  • R
    CURE Research Intern
    ROBERT H LURIE COMPREHENSIVE CANCER CENTER OF NORTHWESTERN UNIVERSITY
    Jun 2015 - Sep 2015 (4 months)
    Honed DNA extraction, purification, and cloning techniques, executed transformations, PCR, Western Blot, cell cultures.
  • Case Western Reserve University
    Laboratory Assistant
    Case Western Reserve University
    Aug 2014 - May 2015 (10 months)
    Apprentice in immunohistochemistry staining procedures and protocols, slice preparation for immunohistochemical staining techniques of spinal ganglia, analyzed immunohistochemical stains for identification of neuronal subtypes present post-lesion, and observed mouse surgery in vivo and post-mortem tissue harvesting.
  • IPICyT
    Intern
    IPICyT
    Jun 2012 - Aug 2012 (3 months)
    Studied molecular genetics techniques such as gel electrophoresis and sequencing and analyzed sequencing results for identification of point mutations.
Education verified_user 0% verified
  • UC Berkeley College of Engineering
    UC Berkeley College of Engineering
    UC Berkeley College of Engineering
    Jan 2024 - Jan 2025 (1 year 1 month)
  • Universidad Nacional Autónoma de México
    Doctor of Philosophy - PhD, Neuroscience
    Universidad Nacional Autónoma de México
    Jan 2019 - Dec 2024 (6 years)
    Trained Rhesus macaque monkeys in a vibrotactile categorization task. Once learned, recorded and analyzed electrophysiological data during the performance of the same task.
  • Northwestern University
    Bachelor of Arts - BA, Neurobiology and Neurosciences
    Northwestern University
    Jan 2015 - Dec 2017 (3 years)
    Gabriel transferred to Northwestern in 2015 after switching career paths from biology and pre-med to a greater focus in neuroscience research. At Northwestern he especially enjoyed studied Neurobiology of Learning, Advanced Topics in Molecular Genetics, and Biophysics.
  • Case Western Reserve University
    Biology/Biological Sciences, General
    Case Western Reserve University
    Jan 2013 - Dec 2015 (3 years)
Awards verified_user 0% verified
  • UNAM
    Honorific Mention
    UNAM
    Aug 2024
Publications verified_user 0% verified
  • P
    An abstract categorical decision code in dorsal premotor cortex
    Proceedings of the National Academy of Sciences of USA PNAS
    Dec 2022
  • P
    Dopamine firing plays a dual role in coding reward prediction errors and signaling motivation in a working memory task
    Proceedings of the National Academy of Sciences of USA PNAS
    Jan 2022
  • N
    A continuum of invariant sensory and behavioral-context perceptual coding in secondary somatosensory cortex
    Nature Communications
    Mar 2021