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Vigneshwaran Moorthi

Mid-level Machine Learning Engineer specializing in LLMs, RAG, and Clinical AI

OptumIllinois Institute of TechnologyChicago, Illinois4 Years ExperienceMid LevelWorks On-Site

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About

Built and productionized a HIPAA-compliant LLM+RAG Clinical AI assistant at Optum, fine-tuning GPT/LLaMA on de-identified patient notes and integrating FAISS/Pinecone for sub-second retrieval; reported to cut diagnosis time by ~20 minutes per case. Experienced in orchestrating ML pipelines (Airflow, AWS Step Functions, Azure Data Factory) and in reliability techniques for LLM systems (grounding, citations, confidence filters, monitoring) while partnering closely with clinicians and compliance teams.

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Key Strengths

  • Built and deployed production LLM+RAG clinical assistant in HIPAA-compliant cloud (AWS/GCP) on Kubernetes
  • Reduced clinician diagnosis time by ~20 minutes per case
  • Strong hallucination-mitigation approach (strict grounding, citations, confidence filtering, safe fallbacks)
  • Low-latency retrieval and inference at scale (FAISS/Pinecone, GPU acceleration, autoscaling)
  • Orchestrated end-to-end ML/ETL and retraining workflows (Airflow, Step Functions, Azure Data Factory)
  • Systematic agent/workflow testing and evaluation (unit tests, edge cases, monitoring; metrics incl. groundedness/latency)
  • Effective cross-functional collaboration with clinicians and risk/compliance stakeholders; translates outputs using SHAP/XAI

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Experience

Machine Learning EngineerOptum · Aug 2024 – Present
Data AnalystAccenture · Jun 2021 – Jul 2023

Education

Illinois Institute of Technologymaster, Artificial Intelligence
Hindusthan College of Engineering and Technologybachelor, Mechanical Engineering

Awards

  • Merit Scholarship ($12K) - Illinois Institute of Technology (Master of Applied Science in AI)
  • Valedictorian (out of 506 students) - Hindusthan College of Engineering and Technology
  • Best Outgoing Student Award - Hindusthan College of Engineering and Technology
  • 1st Rank Holder Gold Medal - Hindusthan College of Engineering and Technology

Languages

English

Certifications

AI for Earth Observation & Geodata Processing – ISRO / IIRS DehradunImage Processing on Ramp – MathWorksMicrosoft AI Fundamentals – MicrosoftData Analyst Associate (Power BI) – Microsoft / UdemyAutomation in Manufacturing – NPTEL, IIT Guwahati

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Vigneshwaran MoorthiMid-level Machine Learning Engineer specializing in LLMs, RAG, and Clinical AI