Data Analytics & Data Science Portfolio

👤 Hamzat Afe Isede

PhD-trained Data Analyst with expertise in data analysis, machine learning, and business intelligence.

I have developed end-to-end data projects covering:

• Predictive modeling (churn prediction)
• Time series forecasting
• Customer segmentation
• Business intelligence dashboards
• Real-world business analysis (Café Harmony case study)
• Behavioral & Retention Analytics

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📊 Projects

1. Customer Churn Prediction

• Machine Learning classification project
• Built using Python and logistic regression
• Identifies customers likely to churn

2. Sales Forecasting (Time Series)

• Forecasted future sales using time series analysis
• Applied Exponential Smoothing
• Evaluated using MAE and RMSE

3. Customer Segmentation

• Applied K-Means clustering
• Identified customer groups based on behavior
• Supports targeted marketing strategies

4. Sales Dashboard (Power BI)

• Built interactive dashboard
• Shows revenue, product, and regional performance
• Includes KPIs and filters

5. Café Harmony Business Analysis

• Business analytics project using Excel and Python
• Performed data cleaning, exploratory analysis, and visualization
• Identified sales trends, product performance, and operational insights
• Aggregated daily data into monthly trends for clearer business interpretation

6. Behavioral & Retention Analytics | SQL

• Conducted end-to-end analysis of sales and customer data to identify growth opportunities
• Segmented users and identified high-risk groups
• Uncovered weak alignment between performance and compensation
• Delivered business recommendations to improve retention and decision-making

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🛠️ Skills Demonstrated

• Python (Pandas, NumPy, scikit-learn)
• SQL
• Power BI
• Excel (Data Cleaning & Analysis)
• Data Visualization
• Machine Learning
• Time Series Analysis
• Data Storytelling

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🔗 GitHub Projects

https://github.com/afeisede/customer-churn-prediction.git

https://github.com/afeisede/Sales-Forecasting.git

https://github.com/afeisede/customer-segmentation.git

https://github.com/afeisede/sales-dashboard.git

https://github.com/afeisede/cafe-harmony-business-analysis.git

https://github.com/afeisede/nextgen-employee-success-analytics-sql.git

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📫 Contact

Email: afeisede@gmail.com
GitHub: https://github.com/afeisede
LinkedIn: www.linkedin.com/in/hamzatafeisede