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nagahemaramishetty/README.md

Hi, I'm Naga Hema Ramishetty

Data Analyst | SQL, Python, Tableau, dbt, Airflow, PySpark | Turning messy, real world data into decisions leadership can act on.

I build end to end analytics workflows, not isolated scripts. From raw ingestion and pipeline orchestration through transformation, testing, and executive facing dashboards, each project below reflects the full analyst lifecycle a business actually runs on.


🧠 About Me

I recently completed my Master's in Computational Science and Data Science at UNC Charlotte. I'm a data analyst with a background spanning SQL and Python driven analysis, workflow orchestration, and stakeholder reporting. My projects are built the way production analytics work actually happens: messy source data, real infrastructure decisions, documented failures and fixes, and a final deliverable meant for someone outside the project to read and trust.


πŸš€ Projects

Project Description Tools
Unified Commerce Data Pipeline End to end e-commerce analytics pipeline: synthetic data with injected real world messiness, idempotent Postgres loads, dbt layered transformations, Airflow orchestrated DAG, PySpark trend analysis, and a live Tableau dashboard Python, PostgreSQL, dbt, Airflow, PySpark, Tableau, Excel
Large-Scale Log Analysis & Anomaly Detection Hybrid anomaly detection pipeline on 1.88M NASA HTTP server logs, combining Isolation Forest for point anomalies and ARIMA for temporal deviations, cutting false alert rate 39% versus threshold based alerting Python, PySpark, Scikit-learn, Statsmodels, Matplotlib
Product Experimentation Analytics Engine A/B testing framework combining frequentist and Bayesian approaches with power analysis and cohort segmentation to support product decision making Python, Statistical Testing, Cohort Analysis
End-to-End Supply Chain Analysis Supply chain analytics on a real world dataset using DuckDB for transformation, an automated PDF executive report, and Tableau visualization DuckDB, Python, reportlab, Tableau
NovaMart Supply Chain Intelligence Platform Star schema supply chain model with SQL window function analysis, Random Forest demand forecasting, and Power BI dashboards SQLite, SQL, Random Forest, Power BI

πŸ“ Featured Project

A full stack analytics pipeline built to mirror what a commerce analytics team actually runs in production.

  • Synthetic e-commerce data with deliberately injected messiness: duplicate records, inconsistent date formats, orphaned foreign keys, late arriving records
  • Idempotent Postgres loads via Python and psycopg2
  • dbt staging, intermediate, and marts layers with automated tests
  • Dockerized Airflow DAG orchestrating load, transform, test, and PySpark rolling revenue trend calculation
  • Live Tableau Public dashboard and an Excel executive summary workbook

View Live Dashboard


πŸ‘©β€πŸ’» Tech Stack

Category Tools
Languages Python, SQL, R.
Databases PostgreSQL, SQLite, DuckDB, MySQL
Transformation & Orchestration dbt, Apache Airflow, PySpark.
Visualization & Reporting Tableau, Power BI, Excel, reportlab
Analysis A/B Testing, Statistical Modeling, Time Series, Anomaly Detection

πŸ“¬ Connect

Popular repositories Loading

  1. end-to-end-supply-chain-analysis end-to-end-supply-chain-analysis Public

    Supply chain analytics project analyzing shipment delays, inventory management and business performance across 30,871 orders using Python, SQL and DuckDB

    Jupyter Notebook

  2. NovaMart-supply-chain-analysis NovaMart-supply-chain-analysis Public

    End-to-end supply chain analytics project built with Python, SQL, Power BI and Machine Learning. Includes demand forecasting model, supplier scorecard, inventory analysis and live KPI dashboard.

    Python

  3. log-analysis-anomaly-detection log-analysis-anomaly-detection Public

    End-to-end log analysis & hybrid anomaly detection pipeline on 1.88M NASA HTTP server logs using Isolation Forest + ARIMA. Reduces false alert rate by 39% vs threshold-based alerting.

    Jupyter Notebook

  4. product-experimentation-analytics-engine product-experimentation-analytics-engine Public

    End-to-end A/B testing framework on 50K e-commerce user events. Frequentist + Bayesian inference, power analysis, cohort segmentation β€” 13 significant interaction effects identified.

    Jupyter Notebook

  5. unified-commerce-data-pipeline unified-commerce-data-pipeline Public

    End-to-end data pipeline reconciling multi-source e-commerce data using PostgreSQL, dbt, Airflow, and PySpark, with Tableau and Excel BI deliverables.

    Python

  6. nagahemaramishetty nagahemaramishetty Public