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Diana Carvalho MonteiroDC

Diana Carvalho Monteiro

Junior Data Analyst & Data Engineer

€150/day
Leiria, PT
0-2 years
Python
SQL
automation
QA testing
Data analysis

Average response time: 1 hour

About Diana

I'm a data professional with a Master's degree in Engineering Physics (University of Lisbon) and hands-on experience at companies like Nokia, where I worked with SQL, Python, and data pipeline automation in a financial operations context.
I help businesses make better use of their data — from extracting and transforming raw data to building automated pipelines and delivering analysis that drives decisions.
My main stack includes Python (pandas, numpy), SQL, and ETL tooling. I also have experience with REST APIs, workflow automation, and data quality validation.
Available for remote freelance projects, one-off or ongoing.

  • English

    Native or bilingual

  • Portuguese

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Nokia
    Graduate Engineer
    January 2023 - January 2025 (2 years)
    Lisbon, Portugal
    • • Developed SQL queries to extract, transform, and validate financial data for integration into cash collection systems.
    • • Automated data preparation workflows using Python, reducing manual processing time and improving accuracy.
    • • Designed structured data tables and transformation logic to support reporting needs.
    • • Built interactive Power BI dashboards to monitor cash collection performance and KPIs.
    • • Processed and validated large datasets to ensure data quality before ingestion into reporting tools.
  • Merkle DAC
    QA Automation Engineer
    January 2022 - January 2023 (1 year)
    Lisbon, Portugal
    • • Automated end-to-end web application tests using Python and Robot Framework.
    • • Developed reusable test scripts to validate user interactions, navigation flows, and expected application behavior.
    • • Identified and reported defects arising from frontend and backend system issues.
    • • Collaborated with developers to support root cause analysis and defect resolution.
    • • Used Git for version control and Jira for task tracking within an Agile development environment.
    • • Increased regression test coverage, reducing manual testing effort and improving release reliability.

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Education

  • Master's Degree in Engineering Physics
    Ciˆ encias da Universidade de Lisboa
    2022
    Master's Degree in Engineering Physics
  • Data Analyst
    Nanodegree
    2026
    Data Analyst

Certifications

Categories