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mayankjoshiii/README.md

Mayank Joshi

Business Analyst · Data Analyst · MSc Business Analytics (Distinction)

Swansea University · Based in the UK · Open to Worldwide Opportunities

Portfolio LinkedIn Email


About

Business Analyst and Data Analyst with an MSc in Business Analytics (Distinction, Swansea University — January 2026) and 4+ years of industry experience across enterprise mobility, financial analysis, and operations. I build end-to-end analytical solutions — from data extraction and statistical modelling to interactive dashboards that drive business decisions. Every project below has a live interactive demo you can explore right now.


Technical Skills

Domain Technologies
Languages & Libraries Python · SQL · Pandas · NumPy · scikit-learn · JavaScript
Visualisation Plotly.js · Tableau · Matplotlib · Seaborn · Advanced Excel
ML & NLP Logistic Regression · Random Forest · K-Means · TF-IDF · Sentiment Analysis · SHAP
Tools & Platforms Git · GitHub Pages · Jupyter · VS Code · Notion
Methodology Agile · Scrum · Requirements Gathering · Stakeholder Management

Portfolio — Live Interactive Dashboards

Every project is a self-contained, interactive dashboard. Click Live Demo to explore in your browser — no installation required.


AI & Machine Learning

ML Model Explainability & Monitoring

SHAP-style feature explanations · Data drift detection (PSI) · Fairness analysis across demographic groups · Partial dependence plots · Interactive what-if simulator

Stack: Plotly.js · JavaScript (ML from scratch)

Live Demo Source Code

Customer Intelligence Platform

K-Means clustering · RFM segmentation · Churn prediction · Cohort retention heatmaps · Sankey customer journey mapping · CLV analysis

Stack: Plotly.js · JavaScript (K-Means, Logistic Regression from scratch)

Live Demo Source Code

NLP Sentiment & Text Analytics

Lexicon-based sentiment scoring (200+ word AFINN-style) · TF-IDF keyword extraction · Aspect-based sentiment heatmaps · Topic trend analysis · 5,000+ review corpus

Stack: Plotly.js · JavaScript (NLP pipeline from scratch)

Live Demo Source Code

RAG Pipeline Analytics & Knowledge Base

Embedding space visualisation (t-SNE) · Retrieval quality heatmaps · Cosine similarity matrices · MCP integration tracking · Query performance analytics

Stack: Plotly.js · JavaScript (vector operations from scratch)

Live Demo Source Code

Customer Churn Prediction

Full ML pipeline on Telco dataset (7,043 records) · SQL exploration · Feature engineering · Logistic regression + Random Forest (82% accuracy, AUC 0.86) · Top churn drivers identified

Stack: Python · SQL · scikit-learn · Plotly.js

Live Demo Source Code


Data Analytics & Business Intelligence

A/B Testing Analytics

Statistical hypothesis testing (z-test, t-test) · Bayesian analysis · Sequential testing with stopping rules · Sample size calculator · Power analysis · Confidence intervals

Stack: Plotly.js · JavaScript (statistics from scratch)

Live Demo Source Code

Time-Series Forecasting

Trend-seasonal decomposition · Multiple forecasting methods · Anomaly detection · Residual analysis · Interactive forecast horizon controls

Stack: Plotly.js · JavaScript (forecasting algorithms from scratch)

Live Demo Source Code

Real-Time Operations Analytics

Live KPI ticker (2.5s refresh) · Geographic heatmap · System health monitor with threshold alerts · Conversion funnel · Hourly activity heatmap · Command-centre dark theme

Stack: Plotly.js · JavaScript (real-time simulation engine)

Live Demo Source Code

Financial KPI Dashboard

Revenue vs Budget vs Forecast · Gross margin & EBITDA tracking · P&L waterfall · Budget variance RAG table · Regional heatmap · Built on UK retail data (ONS/Kaggle)

Stack: Excel (Advanced) · Python · Plotly.js

Live Demo Source Code

UK Job Market Analysis

5,000+ UK job listings scraped and analysed · Salary distributions by region · Top skills demand · Remote vs hybrid patterns · BA/DA market intelligence

Stack: Python · BeautifulSoup · Plotly.js

Live Demo Source Code


What These Projects Demonstrate

Competency Evidence
Statistical Rigour Z-tests, t-tests, Bayesian inference, confidence intervals, power analysis (A/B Testing)
Machine Learning K-Means, Logistic Regression, Random Forest, PCA — implemented from scratch, not library calls
NLP Sentiment lexicons, TF-IDF, aspect-based analysis, topic extraction (NLP Dashboard)
AI Infrastructure RAG pipelines, embedding spaces, MCP integration, retrieval metrics (RAG Analytics)
Model Governance SHAP explanations, drift detection (PSI), fairness auditing (ML Explainability)
Real-Time Systems Live data simulation, streaming KPIs, threshold alerting (Operations Dashboard)
Financial Literacy P&L, EBITDA, budget variance, gross margin analysis (Financial KPI)
End-to-End Delivery Every project goes from raw data to deployed, interactive dashboard

GitHub Activity

GitHub Stats Top Languages


Open to Business Analyst & Data Analyst roles — any industry, any location worldwide

Available immediately · UK-based · MSc Business Analytics (Distinction)

LinkedIn Email

Pinned Loading

  1. uk-job-market-analysis uk-job-market-analysis Public

    UK BA/DA Job Market Analysis | Salary trends, top skills & regional demand | Python · Plotly.js · GitHub Pages

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  2. customer-churn-prediction customer-churn-prediction Public

    Python & SQL pipeline predicting customer churn using logistic regression & random forest | 82% accuracy | Telco dataset (7,043 records)

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  3. financial-kpi-dashboard financial-kpi-dashboard Public

    Interactive Financial KPI Dashboard | Revenue vs Budget vs Forecast | Gross Margin, EBITDA & Variance Analysis | UK Retail Sales 2024

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