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1. imdb-sentiment-classification imdb-sentiment-classification Public

   IMDB 50K Movie Reviews Sentiment Classification: TF-IDF, BiLSTM, and DistilBERT models

   Jupyter Notebook

2. movielens-recommender movielens-recommender Public

   Top-N movie recommendation on MovieLens 1M: from-scratch implicit ALS, item-item CF, and popularity baseline with a leakage-safe temporal split and bootstrap significance testing

   Jupyter Notebook

3. rag-evaluation-framework rag-evaluation-framework Public

   Evaluation framework for RAG systems: retrieval and generation metrics, LLM-as-judge with agreement analysis, statistical testing

   Python

4. rag-pdf-chatbot rag-pdf-chatbot Public

   RAG-powered PDF chatbot using LangChain, Groq (Llama 3.3 70B), FAISS vector store, and Streamlit

   Python

5. saas-churn-sql-analytics saas-churn-sql-analytics Public

   SQL-first analytics on a synthetic SaaS subscription and churn dataset: cohort retention, MRR trends, RFM scoring, and churn drivers, all done in DuckDB with window functions and CTEs

   Python

6. survival-analysis-churn survival-analysis-churn Public

   Survival analysis for customer churn from scratch: Kaplan-Meier, log-rank, Cox PH via Newton-Raphson, Schoenfeld diagnostics, validated on simulation and IBM Telco

   Python