My Portfolio

Successful projects and real-world results

Data Science

Customer Churn Prediction Model

Developed a machine learning model to predict customer churn for a telecom company, enabling proactive retention strategies.

Python Machine Learning Scikit-learn XGBoost
92% Accuracy
35% Cost Reduction
6M Records
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Business Intelligence

Sales Performance Dashboard

Created an interactive Power BI dashboard providing real-time insights into sales performance, trends, and forecasting.

Power BI DAX SQL ETL
40% Time Saved
15+ KPIs Tracked
50+ Users
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Data Analysis

Market Segmentation Analysis

Performed customer segmentation analysis for an e-commerce platform to optimize marketing strategies and personalization.

Python K-Means Pandas Seaborn
8 Segments
28% ROI Increase
2M Customers
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Machine Learning

Fraud Detection System

Built an advanced fraud detection system using deep learning to identify suspicious transactions in real-time.

TensorFlow Deep Learning Python AWS
96% Detection Rate
0.5% False Positive
Real-time Processing
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Business Intelligence

Supply Chain Analytics Platform

Developed a comprehensive analytics platform to optimize supply chain operations and reduce inventory costs.

Tableau R PostgreSQL Forecasting
22% Cost Savings
98% On-time Delivery
10+ Locations
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Machine Learning

Sentiment Analysis Tool

Created an NLP-based sentiment analysis tool to analyze customer reviews and social media feedback at scale.

NLP BERT Python MongoDB
89% Accuracy
1M+ Reviews/Day
12 Languages
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Featured Case Studies

Deep dive into successful projects and their impact

Retail Chain Revenue Optimization

Leading East African Retail Chain

Challenge

A major retail chain was experiencing declining revenues and couldn't identify the root causes. They needed insights into customer behavior, product performance, and optimal pricing strategies across 50+ locations.

Solution

I implemented a comprehensive data analytics solution that integrated sales data from all locations, performed market basket analysis, built predictive models for demand forecasting, and created dynamic pricing recommendations. The solution included real-time dashboards for store managers and executives.

+18%
Revenue Increase
+32%
Customer Retention
-25%
Inventory Waste
6 Months
ROI Timeline

Healthcare Data Analytics Implementation

Private Hospital Network

Challenge

A hospital network needed to optimize patient flow, reduce wait times, and improve resource allocation across departments. Data was siloed across multiple systems with no unified view.

Solution

Developed an integrated data warehouse consolidating patient records, appointment systems, and resource management. Created predictive models for patient admission rates and built interactive dashboards for department heads to monitor KPIs in real-time.

-42%
Wait Time
+28%
Bed Utilization
95%
Patient Satisfaction
$2.4M
Annual Savings

Client Testimonials

"The insights we gained from the data analysis transformed our marketing strategy. The ROI was evident within the first quarter. Highly professional and knowledgeable!"

JM
James Mwangi
CEO, TechStart Kenya

"Outstanding work on our BI dashboard. The team training was comprehensive and now our staff can make data-driven decisions independently. Excellent investment!"

SA
Sarah Achieng
Operations Director, RetailCo

"The machine learning model exceeded our expectations. The accuracy and implementation support were top-notch. A true data science expert!"

DK
David Kimani
CTO, FinanceHub

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