Samuel Maina
Freelance Data Analyst | SQL, Excel, and Power BI Expert.
New to Contra
Samuel is ready for their next project!
Security Support Information System (SSIS)
The Security Support Information System (SSIS) is an end-to-end Business Intelligence solution developed to address operational visibility and decision-making challenges in the private security industry.
The project involved identifying a...
Bakery Sales Dashboard: Power BI
Walkthrough of a full sales analytics project for a bakery chain with 14 store locations. The raw data arrived across two separate tables (sales and price) with duplicates and no clean relationship between them I used SQL to handle the join and...
Amazon Sales Performance Dashboard: SQL to Excel Pipeline
This project showcases an end-to-end data analytics pipeline designed to clean, structure, and visualize massive retail transactional data.
The Raw Data: Processed over 113,000 messy e-commerce records tracking sales,...
This interactive retail dashboard was developed to help a large e-commerce store track their sales performance, monitor profit margins, and look for shipping bottlenecks. The project covers everything from cleaning the raw data in SQL to designing a clean, user-friendly business...
I built this 3-page interactive Power BI dashboard to find out exactly why customers are leaving a major Telecom company and where revenue is at risk. The project covers everything from cleaning the raw data to designing a professional, interactive app-style dashboard.
Core...