Harshitha Raghavan Devarajan

About Harshitha Raghavan Devarajan

Are you solving AI problems for your company?If yes, we should connect because,I specialize in turning LLM research into secure, scalable production systems. As a Data Scientist, I am focused on Applied AI and Machine Learning, with hands-on experience building LLM-powered systems, GenAI pipelines, and Retrieval-Augmented Generation (RAG) solutions across both cloud and finance environments.At AWS, I work on GenAI for Cloud Security, where I build and evaluate AI systems that support secure, large-scale cloud environments—leveraging LLMs, embedding-based retrieval, and model-driven automation Previously at Millennium, I fine-tuned LLMs, engineered RAG pipelines, and developed ML workflows that improved search, classification, and data quality across large institutional datasets. My work included LLM post-training and fine-tuning, text classification, model evaluation, statistical analysis, and predictive modeling in fast-moving, high-stakes environments I enjoy working at the intersection of ML systems, LLM reasoning, and practical product impact—turning models into reliable, scalable features that solve real problems. My background spans AI, NLP, deep learning, cloud platforms, financial analytics, and applied ML research, with hands-on experience in Python, PyTorch, TensorFlow, LangChain, vector search, and AWS-native tooling.

Experience

1. Data Scientist

   Amazon Web Services (AWS)

   Oct 2024 — Present

   GenAI systems, Supervised finetuning, Search and Information retrieval, Cloud Security

Education

• Shanmugha Arts, Science, Technology and Research Academy

  Bachelor of Technology , Computer Science

  2017 — 2021

• New York University

  Master of Science - MS, Computer Science, AI and Machine Learning

• Omega International school

  High School Diploma, Computer Science

  2015 — 2017