Data Analyst Portfolio

Turning data into clear
business decisions.

Bruno Oliveira is an early-career data analyst with hands-on work across Python, SQL, Excel, Tableau, and Google BigQuery. Explore the analysis behind the work.

5
work samples
6
analytics tools
1
Google certificate

Selected work

Find the relevant proof quickly.

Skills sampleSQL

SQL Analysis Workflows

Built practical query workflows using joins, aggregations, CASE logic, temporary tables, and subqueries to prepare data for analysis.

  • SQL
  • BigQuery
  • Data prep
Open project brief
Skills sampleExcel

Excel Data Quality & Reporting

Used validation checks, PivotTables, lookup functions, and conditional logic to clean records, surface errors, and summarize performance.

  • Excel
  • PivotTables
  • VLOOKUP
Open project brief
Skills sampleTableau

Dashboard & Data Storytelling

Designed KPI views, readable labels, filters, geographic context, and concise takeaways that help nontechnical stakeholders scan results.

  • Tableau
  • Dashboards
  • KPIs
Open project brief
Certificate work2026

Google Data Analytics Workflow

Applied the end-to-end analytics process: define a question, prepare and clean data, analyze patterns, share insights, and recommend action.

  • Google Analytics
  • Process
  • Business insights
Open project brief

How I work

From a messy question to an answer people can use.

  1. 01Structure

    Validate, clean, and prepare data before looking for patterns.

  2. 02Analyze

    Use SQL, Python, and spreadsheet logic to test useful questions.

  3. 03Communicate

    Turn results into dashboards, maps, and clear recommendations.

What I did

    Tools & skills