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What Changed in Zod 4: Performance, Mini, and Migration

Web Dev

July 20269 min read

What Changed in Zod 4: Performance, Mini, and Migration

Zod 4 rewrote the validation core for speed, added a 1.9 KB tree-shakable mini build, and reshaped error handling — here is what changed and how to migrate.

The IDOR That Let One Branch Read Another Branch's Revenue

Security

July 20269 min read

The IDOR That Let One Branch Read Another Branch's Revenue

A real IDOR in a multi-branch ERP: how a detail endpoint that fetched by id alone leaked another branch's revenue, and the branchId-scoping fix I rolled across every Prisma module.

Building a POS + Mobile ERP for an Indonesian Carwash SME

Product

July 20269 min read

Building a POS + Mobile ERP for an Indonesian Carwash SME

How I shipped a three-surface ERP — NestJS API, Next.js POS, Flutter field app — for a cash-heavy, multi-branch carwash that loses wifi in the bays.

Why My ERP Cash Book Is a Derived Postgres UNION View

Backend

July 20269 min read

Why My ERP Cash Book Is a Derived Postgres UNION View

How I killed a drift-prone ledger table and rebuilt the JID Carwash cash book as a derived Postgres UNION view over payments, expenses, and kasbon.

Flutter Offline-First Outbox Sync for a Field App

Software Development

July 20269 min read

Flutter Offline-First Outbox Sync for a Field App

How the JID Carwash Flutter field app keeps taking orders in no-signal bays using a local outbox, connectivity_plus, and idempotent replay to a NestJS API.

Why We Store Money as Integer Rupiah, Never Float

Backend

July 20269 min read

Why We Store Money as Integer Rupiah, Never Float

Why the JID Carwash ERP stores every rupiah as an integer, never a float — and the end-of-day reconciliation bug that made the rule non-negotiable.

Showing 103–108 of 428 posts

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