Experiences

Industry roles in applied science, machine learning, and statistics.

Industry

Applied Scientist → Senior Applied Scientist → Principal Applied Scientist
Zillow Inc.
2018 – Present
Principal Applied Scientist — 2024 – Present
  • Tech-leading the large-scale post-training and evaluation effort to improve the action and emotion intelligence of Zillow's new conversational AI Agent.
  • Defining the evaluation framework for the real estate Deep Research Agent.
  • Science lead of a multi-org collaboration to define Zillow's Ethical AI standards on safety and fair housing.
Senior Applied Scientist — 2020 – 2022 & 2023 – 2024
  • Led development of a smart offsite communication system using users' near-term interaction signals to improve upper- and down-funnel engagement.
  • ML models, system and architecture design, and end-to-end development of a self-service, automated, self-aware, and centralized anomaly detection and diagnosis system for batch and streaming data.
  • Authored the open-source Luminaire library — a hands-off anomaly detection package for time series data.
Applied Scientist — 2018 – 2020
  • ML-driven solutions for monitoring and diagnosing anomalies in high-frequency batch and streaming time series data.
Senior Research Scientist
Meta Platforms Inc. (formerly Facebook)
2022 – 2023
  • Member of the Statistics and Privacy team, focusing on improving Ads-retrieval models at scale.
Senior Member Technical Staff (Statistician)
Dell Inc. — Dell Statistica Group
2016 – 2018

Part of this tenure was served at Tibco Software following the acquisition of Dell Statistica by Tibco.

  • End-to-end development of optimally distributed recommender systems for large sparse matrices.
  • End-to-end development of a speech signal matching and real-time process monitoring system using Dynamic Time Warping (DTW).
Graduate Intern Advisor
Dell Inc. — Dell Statistica Group
2015
  • Developed Bayesian models of multivariate response optimization for desirability profiling with continuous and binary responses.

Education

Ph.D. in Statistics
Michigan State University, USA
2016
M.Sc. in Statistics
University of Calcutta, India
2012
B.Sc. in Statistics
Presidency College, University of Calcutta, India
2010

Technical Skills

LLM Post-training Reinforcement Learning Agentic Systems Evaluation Ethical AI Recommender Systems Time Series Anomaly Detection Bayesian Inference Causal Inference PyTorch / Transformers DeepSpeed / PEFT / TRL Nvidia H100 / B200 Spark / PySpark AWS Hive / Presto / SQL