Joseph Juma

About

Data analyst with over a year of experience in building Power BI dashboards, automating reporting workflows, and cleaning and analyzing data using SQL, Python, and Excel. Focused on turning raw data into clear business insights and decision-ready reports.

Experience

• Freelance Data & Reporting Analyst
  Self-Employed
  Jul 2024 – Present
• Junior Data Analyst Intern
  Independent Electoral and Boundaries Commission
  Jun 2025 – Jun 2026

Education

• Bachelor of Science in Computer Science (Data Science and Analytics)
  Karatina University
  Data Science and Analytics · 2021 – 2025

Skills

• SQL
• Git
• GitHub
• Python
• Power BI
• Tableau
• MySQL
• NumPy
• Pandas
• PostgreSQL
• Power Query
• Microsoft Azure
• Excel
• Azure Data Factory
• Azure SQL Database
• SQL Server
• Azure Blob Storage

Projects

• Customer Churn Analysis & Predictive Insights ↗
  Python, Pandas, SQL

  Analyzed customer transaction and demographic data to identify churn factors, performed EDA, built visualizations, and delivered retention recommendations.

• Sales Performance Dashboard & Business Intelligence Analysis ↗
  Power BI, SQL, Power Query, Excel

  Built an interactive dashboard to analyze sales performance, revenue trends, customer behavior, and regional performance. Created KPIs and reduced manual reporting time by approximately 70%.

🗣️ Languages

• English · Professional