Welcome to my Portfolio

Antonio Esquivel Gaytan

Auditable AI with Clinical Precision.

Bridging the gap between Clinical Research and Generative AI. Building systems where the expert remains the architect.

Antonio Esquivel Gaytan
Clinical AI • Cardiology

Impact Highlights

Break The Gap 2025 Finalist

QGuard-Med: AI-supported cardiovascular waitlist prioritization with interpretable scoring

Validation of Clinical Workflows

~80% hallucination reduction + 60% faster reporting while maintaining 100% audit compliance at Pangaea Oncology

Novel Drug Discovery

High-throughput screening identified AMP as novel OPLAH enhancer in heart failure pathway

Novel Biomarker Discovery

TGF-α as robust determinant of 5-oxoproline in CKD-HF patients

Core Expertise

Validation-first GenAI

Moving beyond chatbots. I design systems with strict schema constraints, source-grounding, and human-in-the-loop e-signatures to eliminate hallucinations in clinical reports.

Build Fast, Ship Clean

From local LLMs (Ollama) to secure Cloud (Bedrock). I build reproducible MVPs using FastAPI and Docker that respect patient data privacy boundaries.

Translational Cardiology

PhD research in Heart Failure and oxidative stress. I bring wet-lab methodology (Z', S/B robustness) to AI validation.

Clinical Ops & GCP

Translating protocols into structured visit schedules. LLM-assisted tools that reduce manual workload while maintaining full audit readiness.

Credentials & Qualifications

Education

  • PhD Exp. Cardiology, UMCG (2018-2025)
  • MSc Nanotech & RegMed, UCL (2016-2017)
  • MD Physician, UNAM Mexico (2009-2016)

Compliance & Certs

ICH-GCP E6(R3) Animal Exp. (Art. 9) MDR Awareness AI Ethics (Helsinki) Hugging Face LLM

Technical Stack

Amazon Bedrock Ollama FastAPI Docker Python Claude/Gemini

Expertise Network

AI & GenAI
Clinical
Tech Stack
Research

Clinical AI Capabilities

Research Validation

Z'-factor optimization (>0.5), high-throughput screening, omics pipelines (R/Python), biomarker discovery workflows

Algorithm Fairness

Bias detection across patient populations, representation analysis, clinical impact disparities, equity evaluation

Compliance & Audit

ICH-GCP E6(R3), ALCOA+ principles, audit trail design, regulatory requirements → technical specs

Vibe Coding

Claude Code, Cursor, Windsurf, Anty Gravity. Rapid prototyping, Git workflows, Docker, FastAPI microservices

Prompt Engineering

Schema-constrained outputs, chain-of-thought, source citations, edge case testing, ~80% hallucination reduction

AI Stack Fluency

Foundation models → orchestration (Bedrock/APIs) → application (RAG/agents) → validation → deployment

Concepts & Prototypes

Privacy-First

Offline RAG for HF Guidelines

Local assistant (Ollama) providing citation-based answers from guidelines without PHI exposure.

Concept

Lab SOP Assistant

On-device voice assistant for stepwise execution of laboratory protocols with audit logging.

MVP

Medication Adherence

Privacy-focused tool for medication follow-up (PrEP) with clear clinical responsibility boundaries.

Selected AI Projects in Healthcare

2025-2026 | Benchmark

Clinical LLM Benchmark

Designed and executed an independent benchmark to evaluate clinical reasoning, demographic bias, and specialty-level performance of large language models using structured clinical cases. Implemented robust statistical analysis (including difficulty-aware normalization and subgroup analyses) with reproducible local execution.

MVP | Break The Gap 2025 Finalist

QGuard-Med

Built an early MVP for an AI-supported cardiovascular waitlist prioritization workflow, combining clinical criteria and patient-reported inputs into an interpretable prioritization score. Designed with an integration mindset for clinical workflows and future EHR connectivity.

Framework

Clinical AI Validation & Governance Framework

Developed a practical framework for validation, risk management, and governance of clinical AI/GenAI systems, focusing on traceability, bias evaluation, safety-by-design, and implementation readiness in regulated healthcare environments.

Concept → Prototype

ProtoBot AI

Conceptualized an LLM-based assistant for lab protocol support, designed to guide stepwise execution, reduce procedural errors, and maintain session continuity across multi-day experiments, with "safe" vs "exploration" usage modes.

Concept Product

MiPrEP / PrePárate

Designed a mobile companion concept for PrEP adherence support, including discrete reminders, longitudinal adherence tracking, and patient education features, with a roadmap for clinical-grade monitoring and evaluation.

Concept

LLM Monitoring for Clinical Workflows

Proposed a monitoring layer for LLM-enabled clinical tools (e.g., scribes/copilots) to track performance drift, safety signals, and systematic errors over time, aligned with clinical governance and quality-improvement practices.

Research-adjacent

AI-assisted Biomarker Analytics

Applied advanced analytics and ML-informed approaches to support biomarker discovery and validation workflows, emphasizing robustness checks, reproducibility, and clinically interpretable outputs.

"The question isn't whether AI will be adopted, but by whom it will be constrained. I ensure we don't outsource clinical judgment."

Selected Work

Jun — Sep 2025

Clinical Research & AI Lead

Pangaea Oncology, Barcelona

Orchestrated LLM workflows (Bedrock/Claude) for clinical reporting. Achieved ~80% reduction in hallucinations via prompt engineering.

2024 — 2025

Co-founder & Tech Lead

QGuard-Med, Groningen

Developed a FastAPI/Docker MVP for cardiovascular patient prioritization. Finalist at "Break The Gap 2025".

2018 — Present

PhD Researcher

UMCG, Netherlands

Experimental Cardiology. Investigating 5-oxoproline/OPLAH and oxidative stress. High-throughput assays and data analysis.

Publications

View ORCID
Eur J Heart Fail (2024)

404-error "Disease not found": Unleashing the potential of omics.

ESC Heart Fail (2025)

Glutathione deficiency and heart failure: a systematic review.

Redox Biology (Review)

Elevated 5-Oxoproline Levels Associate with Adverse Outcomes.

Under Review
Br J Dermatol (2022)

A translation re-initiation variant in KLHL24 and cardiomyopathy.

Eur Heart J (2023)

High-throughput screening strategy identifies AMP as a novel OPLAH enhancer.