MARIO ENRIQUE BRENES
ARROYO
San José, Coronado | - |-| San José, Costa Rica | Github Link
Data Analyst with over 2 years of experience in data analysis, visualization, and management. Proficient in creating dashboards,
streamlining ETL processes, and optimizing data workflows using Power BI, SQL, and other analytical tools. Skilled in
transforming raw data into actionable insights to support strategic decision-making and improve business processes.
E DUCATION
Bachelor's Degree in Electrical Engineering | University of Costa Rica
January 2022 – Present
Advanced C# Training | Oracle + Alura Latam
Completed May 2023
SQL Training with MySQL & Postgre | Oracle + Alura Latam
Completed November 2023
EXPERIENCE
Freelancer in Upwork | Power BI Developer | HR Dashboard
July 2024 – August 2024
• Improved KPI systems for measuring employee performance and job analysis.
• Data management.
• Data visualization with Power BI.
• Database management in Excel and SharePoint.
Freelancer in Upwork | Power BI Developer | Financial Control
January 2023 – March 2023
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Developed financial quota management, expense management, and gross, net, and profit margins using MySQL database.
Data management in MySQL.
Data migration to SharePoint.
ETL process and DAX measures.
Data visualization in Power BI.
GEAT Macetas | Data Analyst freelancer | Financial and Stock Control
March 2021 – July 2024
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Budget Efficiency: Enhanced budget management and resource allocation.
Material Optimization: Improved material usage and product quality.
Data Management (ETL): Attracted more customers and improved advertising.
Ad Performance: Boosted visibility and campaign impact.
S KILLS
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Databases: MySQL, SQL Server, Google BigQuery, AWS, OCI
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Electronics Knowledge SPI, I2C
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Programming Languages: Python, C#, Verilog, MIPS, SQL, java
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BI Tools: Power BI, Tableau
Comunication, teamwork
English B2
