Abishek Chiffon

Senior Machine Learning Engineer @ Walmart

Washington, District of Columbia, United States

About

With over 6 years of experience driving impact across healthcare, business intelligence, and supply chain optimization, I specialize in building intelligent systems that transform complex data into real-world solutions. Completed master's in Data Science at The George Washington University. I’ve collaborated with the Facebook AI Research team to contribute to the development of PyTorch and TorchServe, and have built LLM-powered agents and chatbots for the finance and healthcare industries. My expertise includes automatic ETL extraction from unstructured data using large language models, alongside a solid foundation in computer vision, NLP, statistical analysis, and data engineering. My journey is backed by hands-on training from Udacity, Coursera, Stanford, and MIT, where I developed scalable and production-ready ML solutions.

Experience

  • Senior Machine Learning Engineer at Walmart Global Tech
    Oct 2025 - Present · 10 mos

  • Elessar Consulting Group (Remote)
    • Lead Data Scientist
      Aug 2025 - Oct 2025 · 3 mos

      •Led a team to build LLM-driven auto-scripters to streamline ETL from messy financial text, achieving a 70% reduction in manual processing. •Built PII anonymizer for bank docs using LLMs (Qwen3, Phi-4) and deployed them with vLLM, reducing manual redaction by 80%.

    • Senior Data Scientist
      Mar 2025 - Jul 2025 · 5 mos

  • Data Science Intern at Genmab
    Jun 2024 - Mar 2025 · 10 mos

  • The George Washington University (Washington, District of Columbia, United States · On-site)
    • President, Data Science for Sustainable Development Hub, GW Data Science Association
      Jun 2024 - Mar 2025 · 10 mos

      • Leader of the sustainable development research and consulting branch of GW’s Data Science Association. • DSSD is a 501(c)3 certified non-profit, to GW to offer undergraduate and graduate data science students the opportunity to gain real-world sustainable development experience

    • Student Facilities Assistant
      Dec 2023 - Mar 2025 · 1 yr 4 mos

  • Data Scientist at Data Science for Sustainable Development
    Aug 2023 - Mar 2025 · 1 yr 8 mos

    Performed geospatial calculations and create a dashboard with interactive maps to visualize war-damaged windows in Ukraine to aid the government in replacement efforts.