Freelance Data Analysts in ViennaFreelance Data Analysts in Vienna
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Zain Haidar's avatar
Zain Haidar
Vienna, Austria
Expert Data Analysis & Visualization Specialist
Expert Data Analysis & Visualization Specialist
Cover image for London Bike Rides
London Bike Rides
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Cover image for Shark Tank series
Shark Tank series
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20
Cover image for Spotify Data Analysis
Spotify Data Analysis
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25
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Data Analyst(3)
Simeon Hauser's avatar
Simeon Hauser
Altlengbach, Austria
AI-assisted Python, CSV cleanup and reporting
New to Contra
AI-assisted Python, CSV cleanup and reporting
Cover image for Marktlabor: a self-initiated market research
Marktlabor: a self-initiated market research dashboard built with AI assistance. Python prepares daily market data and a JavaScript interface provides instrument filters, watchlists, trend indicators, charts and CSV exports. This screenshot shows the working prototype using a dated historical snapshot. It demonstrates data tooling and interface implementation; it does not establish future investment returns or offer trading advice.
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Cover image for CSV-to-PDF reporting extension. This working
CSV-to-PDF reporting extension. This working Python/ReportLab component turns validated records into a readable PDF with separate currency totals, a row-level table and source traceability. Existing output files are protected from overwriting. Part of the same CSV workflow demo shown in this portfolio, built with AI assistance and tested using synthetic records. The image shows the generated PDF, not a client document.
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Cover image for CSV validation and reporting: a
CSV validation and reporting: a working Python demo that separates accepted rows, duplicates and exceptions, preserves source files, and creates an auditable HTML report. This self-initiated, AI-assisted sample uses synthetic data, not client records. Demo result: 18 input rows, 12 accepted, 1 duplicate and 5 rows flagged for review. Currency totals are kept separate.
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Cover image for Procedural motion study: a flexible
Procedural motion study: a flexible chain changing shape in a seamless loop. A self-initiated, AI-assisted Python animation with synthetic geometry and fixed segment lengths. This is a design/implementation demo, not molecular dynamics, measured protein data or a scientific result. Client references and scientist review would define any final biological animation. Rendered locally with existing tools; no paid generative-video subscription was used.
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Data Analyst(3)