Amitabha Dey

About Amitabha Dey

I am a Senior Data Scientist at Optum (UnitedHealth Group), specializing in Large Language Models (LLMs) and their applications in healthcare and enterprise AI. With over ten years of experience in Natural Language Processing (NLP) and machine learning, I focus on building, fine-tuning, and deploying domain-adapted LLMs that operate under clinical, enterprise, and regulatory constraints.Previously, I was a Lecturer in Computer Science at the University of North Carolina at Greensboro (UNCG), where I taught systems programming, data structures, and data science, and guided students in research and applied ML projects.My research explores long-sequence processing, domain adaptation, and multimodal understanding — advancing how LLMs can support healthcare workflows, medical coding, and patient–provider communication.You can find more about me at - https://amitabhadey.github.io/

Experience

1. Senior Data Scientist

   Optum

   Aug 2025 — Present · US

   Lead a specialized pod advancing healthcare-focused Large Language Models (LLMs) — architecting, fine-tuning, and deploying domain-adapted models optimized for long-sequence processing, automated medical coding, and clinical text understanding. Work includes domain adaptation, retrieval-augmented generation, and evaluation across provider–patient communication, coding accuracy, and compliance-sensitive use cases. Engineer multi-cloud, large-scale training and inference pipelines leveraging AWS SageMaker, Azure AI Foundry, and distributed GPU clusters (e.g, NC80adis_H100_v5) with advanced Python automation, CI/CD orchestration, and containerized workflows. Pipelines integrate large-scale data ingestion, preprocessing, model training, versioning, and inference optimization across heterogeneous compute environments.

Education

• BRAC University

  Bachelor of Science - BS, Computer Science

• University of North Carolina at Greensboro

  Master of Science - MS, Computer Science

• Anandaniketan School

  Edexcel IGCSE & A'Levels, Mathematics, Further Mathematics, Chemistry, Physics

  2011 — 2013

Skills

• Product Development
• Microsoft Powerpoint
• Web Design
• Strategic Planning
• Python
• Project Management
• Microsoft Word
• Team Leadership
• Graphic Design
• Speed Reading
• Vector Illustration
• Programming
• 3d Rendering
• Microsoft Excel
• Public Speaking
• Mockups
• Microsoft Office
• Social Media
• Javascript
• Research
• User Interface Design
• Teamwork
• Team Management
• Management
• Java
• Html
• Wireframes
• Adobe Photoshop
• Creative Writing
• Jquery
• Php
• Cascading Style Sheets (Css)