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iguesshecodes/README.md
Varesh Nirbhavne, data and marketing analyst

Portfolio · LinkedIn · Email

Open to junior Data Analyst and Marketing Analyst roles anywhere in the UK, or remote. Right to work: UK Graduate visa, December 2026 to December 2028. No employer sponsorship required.

Selected work

Each project lists its limits. Simulated data is labelled as simulated.

Project What I found Stack
H&M customer retention Ranking at-risk customers by risk x past spend caught 49.4% of lost revenue. A plain churn model caught 11.0% from the same list size. Python, DuckDB, Tableau, Ollama
F1 2026 championship forecast Two models, two answers: Antonelli at 22.4% in the weighted SQL model, 76.1% in 5,000 Monte Carlo runs. The gap is the interesting part. BigQuery SQL, Python
Tesco vs Ocado online grocery Ocado averaged 33.8 on Lighthouse performance against 49.8 for Sainsbury's. 10 experiments scored on ICE. Meta Ad Library, Lighthouse, Tableau
Revolut London growth study Simulated data. 59 of 500 campaigns had negative ROI, about £1.9M of £12.7M simulated spend. Python, SQL
Harry Styles tour analytics Revenue concentrates in New York and Los Angeles. Stadiums vary more in revenue per seat than arenas. Python, SQLite, Plotly
BNPL and impulse buying MSc dissertation, 163 UK shoppers. BNPL use predicted impulse buying (beta 0.472, p < 0.001). Correlational, not causal. SPSS, regression

Toolkit

Languages Python (pandas, NumPy, scikit-learn), SQL (window functions, CTEs, DuckDB, SQLite, BigQuery)
Analytics Excel, Tableau, GA4, A/B test design, regression, SPSS
Marketing Meta Ads Manager, Google Ads (Search certified), HubSpot
AI Local LLMs with Ollama, plus number checkers for AI-written reports

How I work

  1. Start with the business question, not the dataset.
  2. Check the sample is fair before trusting the result.
  3. Keep the model simple when a complex one scores the same.
  4. Test the AI. My first AI-written summary mixed up customers and revenue, so I built a number checker.
  5. Write the limits down. Accuracy is not the same as usefulness.

Background

I started in filmmaking and marketing, and the question that kept coming back was which of it actually worked? I finished an MSc Marketing (Merit) at the University of Birmingham while teaching myself SQL, Python and machine learning on the side. That mix of analytics and marketing is where I want to work.

Pinned Loading

  1. H-M-ANALYTICS- H-M-ANALYTICS- Public

    Customer churn and retention analysis on 31.8M H&M purchases. SQL, Python, Tableau, local LLM. Ranking by risk x spend catches 49.4% of lost revenue vs 11.0%.

    Python

  2. tesco-ocado-growth-audit tesco-ocado-growth-audit Public

    UK online grocery growth audit: Lighthouse tests, Meta Ad Library creative review and 10 ICE-scored experiments.

  3. revolut-london-growth-study revolut-london-growth-study Public

    Simulated fintech growth study: LTV by channel, borough opportunity scoring, wasted-spend analysis and an honest churn result. SQL, Python.

    Python

  4. harry-styles-tour-analytics harry-styles-tour-analytics Public

    Global tour market intelligence: arena vs stadium economics, revenue per seat and pricing power. Python, SQL, Plotly.

    Python

  5. Varesh-Portfolio Varesh-Portfolio Public

    Source for my data and marketing analyst portfolio site: vareshportfolio.vercel.app

    HTML

  6. F1-2026-Championship-Forecast F1-2026-Championship-Forecast Public

    F1 2026 Championship Forecast using SQL-based weighted modeling and Monte Carlo simulation (Barcelona GP Update)

    Python 1