May 17, 2026 · 4 min read

The 57% number — how we cut the Tata Group BigQuery bill in half

₹100 Cr / ~$12M in proven savings across a year-plus engagement. The four levers that did the heavy lifting, the lever I expected to win that didn't, and the post-engagement playbook that became a Searce managed service.

BigQueryFinOpsGCPTata GroupCost Optimisation
May 16, 2026 · 4 min read

Optimus — a Gemini-powered BigQuery anti-pattern detector that paid for itself in a week

We built a small Go + Python service that parses a project's INFORMATION_SCHEMA, asks Gemini to classify each top-spending query against a catalog of anti-patterns, and recommends a rewrite. It is not a magic box; it is a pipeline that cuts the human review time per query from 20 minutes to 90 seconds.

BigQueryGeminiFinOpsGoPython
May 13, 2026 · 5 min read

The Spanner Migration Tool — a contributor's reading map

Notes from contributing to Google's open-source Spanner Migration Tool (HarbourBridge). Where to start reading the codebase, where the load-bearing logic lives, and the parts that look simple but aren't.

SpannerOpen SourceGoDatabase Migration
May 11, 2026 · 4 min read

Spanner interleaved tables — when and when not

Interleaving a child table into its parent co-locates the rows for fast joins. It also tightens coupling in ways that bite you on the next schema migration. A practitioner's decision matrix.

SpannerDatabase DesignSchema