Ruben Jansen Data Analyst & Data Freelancer

About Me Projects Services

My Expertise

Experienced data professional with expertise in transforming complex datasets into actionable business insights. I specialize in data analysis, visualization, and building comprehensive analytics solutions that drive informed decision-making. Available for freelance projects ranging from dashboard development to strategic data consulting.

Data Analysis

Advanced statistical analysis and data manipulation using Python, R, and SQL. Experienced in cleaning, transforming, and analyzing complex datasets to uncover meaningful insights and trends.

Visualization

Creating compelling data visualizations and interactive dashboards using tools like Tableau, Power BI, D3.js, and Plotly. Transforming complex data into clear, actionable visual stories.

Business Intelligence

Building end-to-end BI solutions including ETL pipelines, data warehousing, and automated reporting systems. Experience with cloud platforms and enterprise data architectures.

Featured Projects

Sales Dashboard Analytics

Sales Performance Dashboard

  • Power BI
  • SQL Server
  • DAX

Comprehensive sales analytics dashboard providing real-time insights into revenue trends, customer segmentation, and product performance. Features interactive visualizations, automated data refresh, and drill-down capabilities for detailed analysis.

View Dashboard
Customer Analytics Python

Customer Behavior Analysis

  • Python
  • Pandas
  • Scikit-learn

Advanced customer segmentation analysis using machine learning algorithms. Identified key customer personas, predicted churn probability, and recommended targeted marketing strategies resulting in 25% increase in retention.

View on GitHub
Financial ETL Pipeline

Financial Data ETL Pipeline

  • Apache Airflow
  • PostgreSQL
  • Docker

Automated ETL pipeline processing daily financial transactions from multiple sources. Built with error handling, data validation, and monitoring capabilities. Reduced manual data processing time by 80%.

Technical Details

Freelance Services

Available for data projects ranging from quick analyses to comprehensive business intelligence solutions. Let's transform your data into actionable insights.

Data Analysis

Transform raw data into actionable insights through statistical analysis, trend identification, and predictive modeling. Perfect for understanding customer behavior, market trends, and business performance.

Dashboard Development

Custom interactive dashboards and automated reporting solutions using Power BI, Tableau, or web technologies. Real-time data visualization that empowers decision-making at every level.

Data Consulting

Strategic guidance on data architecture, ETL processes, and analytics strategy. Help establish data governance, optimize workflows, and build scalable data infrastructure for growing businesses.

Ready to Start Your Project?

Get in touch to discuss your data needs and receive a customized proposal.

Contact Me