Guide · updated 2026-11-04
Building a data cleaning portfolio project
How to present a cleaning project that shows judgment, not just code.
Pick a realistic brief
Use a dataset with real problems and write a short business brief: who needs the data and for what.
Show the evidence
Include the rules, the exception report, a reconciliation and the open questions you would ask.
Explain trade-offs
Write a page on the decisions you made and the alternatives. That is what reviewers remember.