InterSystems Employee Programming Challenge #1. Identifies variable astronomical objects in Gaia DR3 epoch photometry data using IRIS Embedded Python with a C shared library for maximum throughput.

InterSystems Employee Programming Challenge #1 — processes 20 gzip-compressed Gaia DR3 EpochPhotometry files to identify astronomical objects whose BP or RP flux changed by more than 100%, using IRIS ObjectScript + Polars (Python) for high-performance parallel processing.