Obaid Raja

Power BI Developer & Data Analyst

Freelance • ZZP

Dec 2025 - Present • 10 mos

I build interactive Power BI dashboards and reports that turn raw Excel, CSV and SQL data into clear, decision-ready insights. What I work with: - Power Query: cleaning, transforming and combining messy data - DAX: KPIs and measures such as averages, totals, growth and period-over-period comparisons - Data modelling: relationships between tables for accurate cross-table analysis - Visuals: KPI cards, bar and column charts, treemaps, gauges, donut charts, slicers and drill-down Portfolio project: Data Professional Survey Dashboard. I analysed a survey of 630 data professionals across 28 fields (role, salary, industry, programming language, job satisfaction, age, country, education). I cleaned the data in Power Query, built DAX measures such as average salary by job title, and designed a one-page report with KPI cards, a salary-by-role chart, a country treemap, satisfaction gauges and a chart showing how hard people found breaking into data. I focus on reports that are accurate, easy to read and built around the questions you need answered.