GST return status queries went from 3,000ms+ to sub-15ms at peak load by reading a precomputed projection that filing writers keep fresh through domain events. Requirements, options and the update path.
Four ways a GST portal integration lost or corrupted data while every request succeeded — a case-sensitive parameter, an unechoed field, a delegated rule and an over-broad sum — and how each was closed.
Automated Indian GST compliance, multi-way ledger reconciliation, GSTR-1/3B return filings, and an asynchronous AI-powered invoice extraction pipeline.