Insights

Notes from the work

What we learned building and replacing systems that businesses depend on. Written for owners and technical leads deciding what to do with theirs.

Case study notes

Why we rebuilt BATS CRM instead of patching it, and how nobody noticed

A code-generated CRM with paying customers had become hard to change. We assessed it, rebuilt it alongside the old system, migrated tenants in batches and retired the old infrastructure, with no downtime.

Davor Mićić, 8 October 2026

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