Sjaak Waarts is a seasoned full-stack Data Science and BI developer with about nine years of recent hands-on experience and a long technical career spanning software development, systems architecture, and business analysis. He helps companies turn data into actionable decisions as an independent contractor, building end-to-end solutions with open source tools such as Python, R, Spark, NoSQL, and modern JavaScript frameworks. His background includes designing SAP BW/BI and planning systems, blending enterprise-grade ETL and planning expertise with experiments in machine learning, sentiment analysis, and analytical search. Comfortable across the stack and cloud environments, he combines deep legacy-system knowledge from early-career roles (C, PowerBuilder, ERP integrations) with contemporary data science practices. Based in the Netherlands, he’s pragmatic about delivering value quickly through a methodology-driven approach and retains a developer’s curiosity rooted in his Delft computer science education.
9 years of coding experience
23 years of employment as a software developer
Data Science, Data Science at Tilburg University
ir, computer science, ir, computer science at Delft University of Technology
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Sjaak Waarts - Data Science And BI - Full Stack Developer