A multi-week reporting slog, down to a few minutes

Cebir builds assessment tests. Every cycle, they compute statistics on test takings and turn them into detailed reports — work that used to be done by hand and often took several weeks to finish.

The process was split across sub-processes, with a lot of copy-pasting of both code and data from one step to feed the next. Every handoff was a chance for a mistake, and the whole thing was slow.

What shipped

An Airflow-orchestrated pipeline that does the heavy data work in Polars and generates the finished reports with python-docx and openpyxl. The manual handoffs between steps are gone — the chain runs end to end on its own.

Result

A process that took weeks now runs in minutes, and the manual copy-pasting that caused most of the errors is gone entirely.