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Tinyiko-Mathebula/README.md

Hi, I'm Tinyiko Patience Mathebula 👋

Data Analyst | Python · SQL · Power BI · Machine Learning | Johannesburg, Gauteng

🎯 What I Do

I build end-to-end data solutions — from relational database design and SQL analysis through to machine learning pipelines and business intelligence dashboards.

I bring something most analysts at my level don't: 8+ years of operational data experience managing POPIA-compliant systems, designing reporting workflows, and delivering insights to leadership — before formally transitioning into data analytics.

🚀 Featured Projects

Project What it proves Tools
Credit Risk Intelligence Platform Improved model AUC from 0.68 → 0.7822. DataQuest 2026 competition. Python, Scikit-Learn, Streamlit
Customer Churn Prediction 0.77 AUC · 3 models compared · catches 65% of churners Python, Scikit-Learn, pandas
Retail Sales & RFM Segmentation 25,000 transactions · top 20% of customers = 83.6% of revenue Python, MySQL, pandas
Enterprise Banking Database 3NF design · audit logging · fraud detection logic MySQL, SQL
Telecom Churn Dashboard Interactive KPI dashboard · DAX measures · churn driver analysis Power BI, DAX
Pension Data SQL Analytics Contribution auditing · data quality · regulatory reporting MySQL, SQL

🛠️ Technical Stack

Languages & Analysis Python SQL MySQL pandas NumPy scikit-learn matplotlib seaborn

Machine Learning Logistic Regression Random Forest Gradient Boosting Feature Engineering WoE/IV Analysis

Business Intelligence Microsoft Power BI DAX Tableau Streamlit Excel (Advanced)

Databases & Governance Relational Database Design 3NF Normalisation Oracle Database POPIA Compliance Data Quality Auditing

Web & Tools GitHub HTML CSS Google Workspace AI-assisted workflows (Claude, ChatGPT)

📚 Currently Building

  • 🎓 BCom Business Informatics — UNISA (Final year, completing Nov 2026)
  • 📊 GCI 2026 DataCamp Programme — active participant
  • 👩🏾‍💻 DataCamp | Women in Data 2026 — active participant
  • 🔬 DataCamp DataLab: International Debt Statistics · Netflix Movies · Students' Mental Health

📫 Connect

LinkedIn Email

Open to Junior to Mid Data Analyst roles in Johannesburg · On-site · Hybrid · Remote

Pinned Loading

  1. dataquest-2026-credit-risk dataquest-2026-credit-risk Public

    Credit Risk Intelligence Platform — DataQuest 2026. Improved baseline model AUC from 0.68 to 0.7822 using feature engineering and WoE encoding. Interactive Streamlit dashboard for regulator-aware r…

    Python

  2. python-churn-prediction python-churn-prediction Public

    End-to-end customer churn prediction pipeline — 0.77 AUC · 5,880 customers · 3 models compared (Logistic Regression, Random Forest, Gradient Boosting) · threshold tuning catches 65% of churners. Py…

    Jupyter Notebook

  3. retail-sales-analysis retail-sales-analysis Public

    Retail sales analysis & RFM customer segmentation · 25,000 transactions · 13 months · top 20% of customers generate 83.6% of revenue · 8 customer segments identified · 5 business recommendations. P…

    Python

  4. enterprise_banking_database_system enterprise_banking_database_system Public

    Enterprise-level relational banking database — 3NF architecture, transaction control, audit logging, fraud detection logic, and performance indexing. Built to satisfy tier-1 banking data requiremen…

  5. Telecom-Customer-Churn-PowerBI Telecom-Customer-Churn-PowerBI Public

    Interactive Power BI dashboard analysing telecom customer churn — KPI cards, DAX measures, and slicers identifying key churn drivers: contract type, service type, and payment method. Power BI · DAX…

  6. pension-data-sql-project pension-data-sql-project Public

    SQL pension administration database — contribution analysis, data quality auditing, missing payment detection, and aggregated regulatory reporting. Built to simulate real-world pension fund data ma…