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rishi bhardwaj

@rishibhardwaj1

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Lead Data Scientist specializing in GenAI, ML systems, and revenue-driving analytics.

India

Message

What I'm looking for

I seek roles applying GenAI and production ML to drive measurable revenue and user impact, in collaborative, product-focused teams with opportunities to influence platform strategy.

I am a Lead Data Scientist with over 14 years of experience building and scaling machine learning, deep learning, and GenAI systems across recommendation, attribution, risk, retention, and healthcare analytics.

I design hybrid AI architectures—combining LSTM-based sequential models with LLM-driven semantic re-ranking—and translate research into measurable business outcomes such as conversion uplift, revenue gains, and cost reductions.

My work includes architecting production ML pipelines under regulatory constraints, creating explainable models for healthcare use cases, and developing embeddings and topic models to surface executive insights.

I focus on pragmatic, revenue-focused solutions, influencing platform strategy to integrate LLMs effectively with predictive models and delivering demonstrable ROI improvements in marketing and member-targeting applications.

Experience

Work history, roles, and key accomplishments

Current

Lead Data Scientist

Current

Decision Culture

Nov 2022 - Present (3 years 1 month)

Architected hybrid LSTM+LLM recommendation and re-ranking systems that produced measurable decile-wise conversion uplift and influenced AI platform strategy to optimize GenAI investment.

Transformers LLM RAG XGBoost Python BigQuery Experimentation

Senior Data Scientist

UnitedHealth Group

Feb 2019 - Nov 2022 (3 years 9 months)

Designed and deployed scalable production ML systems (ANN+LSTM, uplift models, medical code embeddings) achieving high top-decile capture (e.g., ~60% MRI event capture) and improved care navigation.

ANNS Topic modeling Embeddings Python SQL GCP