Dilson Cassaro
Data, QA & AI Evaluation Specialist
New to Contra
Dilson is ready for their next project!
E-commerce Sales Dashboard in Power BI
Interactive Power BI dashboard designed to analyze e-commerce sales performance.
The dashboard presents key business metrics related to revenue, customers, and product performance through interactive visualizations.
I built the dashboard to organize business data into clear KPIs and visual views that make it easier to monitor sales performance and identify relevant patterns.
The project demonstrates practical experience in Power BI, data analysis, KPI reporting, dashboard design, and data visualization.
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Personal data analysis project exploring Airbnb listings in Madrid using Python and Pandas.
The project focused on cleaning, validating, and exploring a real-world dataset to identify patterns in Airbnb listings, pricing, and location.
I used Python and Pandas to prepare the data, handle inconsistencies, perform exploratory analysis, and extract meaningful insights from the dataset. The analysis included comparing average prices across Madrid neighborhoods and identifying geographic patterns in listing prices.
The visualization shown here highlights the 10 most expensive neighborhoods for entire-home Airbnb listings based on average price.
Skills demonstrated: Python, Pandas, data cleaning, exploratory data analysis, data interpretation, and data visualization.
This project is part of my independent data analytics portfolio and demonstrates my ability to turn raw datasets into structured analysis and clear, actionable insights
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E-commerce sales analysis using SQL and Python to identify business trends and customer insights.
The project combines SQL-based analysis with Python to explore sales performance, revenue trends, product performance, and customer-related patterns.
I used SQL to query and aggregate the data and Python to further manipulate, analyze, and visualize the results.
The analysis demonstrates practical experience in SQL querying, data manipulation, exploratory data analysis, data interpretation, and business-focused reporting.
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Task Assignment Tool is a web-based application I built with Python and Streamlit to help team leads assign and manage tasks across multiple testers.
The application was designed to address practical workload-management and task-allocation challenges in multi-user testing environments.
Users can upload team rosters in CSV or Excel format, create and assign tasks based on language requirements, monitor tester availability and workload, and manage assignment conflicts when multiple users are working simultaneously.
The tool also generates reports with actionable insights and supports real-time collaboration, making task allocation and workload distribution more transparent and structured.
The project demonstrates practical experience in Python application development, workflow automation, data handling, workload management, and building tools designed around real operational problems.
Tech stack: Python, Streamlit, GitHub.
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