Eduardo Sá, Developer in Vila Nova de Gaia, Portugal
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Eduardo Sá

Verified Expert  in Engineering

Data Analyst and Power BI Developer

Vila Nova de Gaia, Portugal
Toptal Member Since
March 9, 2021

Eduardo is a seasoned data analyst and SQL expert with a certification in Microsoft Power BI and complementary knowledge of Python and R. With 10+ years of experience in telecommunications, including Nokia, Vodafone UK, Verizon US, Optus AUS, Orange UK, and Portugal Telecom, he has delivered projects across multiple geographies and cultures. Eduardo employs advanced analytical and interpersonal skills to build the best data-based solutions for his clients.


Data Analytics, Python 3, Power Query, Microsoft Power BI, QGIS, Python...
Microsoft Power BI, SQL, Data Analytics, Key Performance Indicators (KPIs)...
R, QGIS, Microsoft Power BI, Mobile Operators, 2G, 3G, 4G, 5G, QlikView...




Preferred Environment

Windows, SQL, Microsoft Power BI

The most amazing... analytics project I've delivered was for a mobile operator in Australia, ensuring success across a 12-hour time zone change.

Work Experience

Business Analyst

2019 - PRESENT
  • Delivered a Power BI solution for mobile network optimization, including SQL for data ingestion, Power Query, data modeling, DAX, and visuals, plus automatic neighbor planning, ten audits, and a self-organizing data feature.
  • Envisioned and executed a one-year data product roadmap to deploy big data and AI on telecom networks.
  • Built multiple models for radio optimization on 2G, using SQL and Power BI, which reduced the number of drops by 20% for a city-wide network.
  • Coordinated a team of three people, including a data engineer, a data scientist, and a UX engineer, to deliver three AI projects applied to telecom to date.
Technologies: Data Analytics, Python 3, Power Query, Microsoft Power BI, QGIS, Python, Excel 365, Product Ownership, DAX, Data Visualization, Dashboard Design, Data Modeling, Microsoft Excel, Business Intelligence (BI), Data Structures, Data Integration, Dashboards, ETL, Dedicated SQL Pool (formerly SQL DW), Azure SQL Data Warehouse, SharePoint, Warehouses, BI Reporting, BI Reports, Databases, APIs, CRM APIs, REST APIs, Sales Reports

Mobile Radio Engineer

2017 - 2019
  • Managed and supported the development of a web app to track P3 mobile network quality assessment campaigns in the UK for Vodafone.
  • Developed a series of network audits for constant mobile radio monitoring.
  • Managed the mobile network quality in a region in the UK. Analyzed KPIs and promoted initiatives to improve overall performance.
  • Managed the communication, reporting, and requirements definition as the single point of contact while serving as the acting team lead for a 10-person consulting team working for Vodafone UK.
Technologies: Microsoft Power BI, SQL, Data Analytics, Key Performance Indicators (KPIs), Tableau, Excel 365, Product Ownership, Data Visualization, QGIS, Dashboard Design, Data Modeling, Microsoft Excel, Business Intelligence (BI), Data Integration, BI Reporting, BI Reports, Databases, APIs

Mobile Radio Engineer

2012 - 2017
  • Delivered a project of small cell planning in 4G for a large metropolitan area, using 3D geolocation technologies. Integrated customer data with a Nokia solution and data visualization tools such as Qlik.
  • Created an antenna radiation pattern database with more than 6,000 files.
  • Conducted presentations and tours of Nokia's office for customers and other visiting professionals.
Technologies: R, QGIS, Microsoft Power BI, Mobile Operators, 2G, 3G, 4G, 5G, QlikView, Excel 365, Microsoft Excel, BI Reports, Databases

Junior Researcher

2008 - 2012
Instituto Superior Técnico
  • Implemented a WiMAX cellular network simulator on MATLAB.
  • Demonstrated how deploying energy-saving techniques to existing WiMAX protocols made it possible to improve traffic without increasing power consumption on the cellular network.
  • Coordinated and contributed to numerous papers and deliverables while participating in projects financed by the European Commission under the FP7 program. Teams included colleagues from academia and industry and from multiple European countries.
Technologies: MATLAB, WiMAX, Telecommunications, Analytical Thinking, Technical Writing, Excel 365, Microsoft Excel

Published Power BI App | Analytics for Microsoft 365

I handled the complete development of the Power BI app for the Microsoft software analytics company.

• Power BI template app published on Microsoft AppSource
• Data model definition for customer distribution with the app
• Graphics and interactions development
• Data load optimization

Mobile Radio Automation Portal

A series of automation processes on a mobile radio network. I combined my telecom and data analytics expertise to develop these processes using SQL and Power BI.

• Defined the available data
• Identified automation and improvement opportunities
• Developed a prototype using SQL and Power BI
• Communicated with IT to integrate the automation on the portal
• Negotiated with the customer on the sequence in which would roll out the automation
• Ensured proper training of the customer team
2002 - 2008

Master's Degree in Telecommunications

University of Porto - Porto, Portugal


Microsoft Certified: Data Analyst Associate





Microsoft Power BI, Power Query, Excel 2016, Microsoft Excel, Tableau, MATLAB


SQL, Python 3, R, Power Query M, Python


Business Intelligence (BI), ETL

Industry Expertise



Azure SQL Data Warehouse, SharePoint, Dedicated SQL Pool (formerly SQL DW), Windows, QlikView


MySQL, Data Integration, Databases


Data Analytics, Dashboards, Excel 365, DAX, Data Visualization, Data Modeling, Data Engineering, Data Analysis, Data Structures, Data Warehousing, Warehouses, BI Reporting, BI Reports, APIs, CRM APIs, Product Ownership, QGIS, Mobile Operators, 2G, 3G, 4G, 5G, Key Performance Indicators (KPIs), WiMAX, Analytical Thinking, Technical Writing, Dashboard Design, Sales Reports

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