Product · 2026 · in production

Niiko

The operating system Vorluno runs on: clients, billing and work in one ledger.

What was mine

The architecture and every final call. I decide what gets built, and I'm the only one who approves a merge to main. In production since 2026, with SDKs in TypeScript and Python, a CLI, an n8n node and an MCP server.

What I decided

Document everything before building anything. Open eight repositories at once under Apache 2.0 — with a Python SDK too. Everything that faces outward is in English. In the ledger nothing is edited or deleted: a correction is always a new entry.

The hard part

On July 19 production went down with a 502: the ORM silently skips a migration that arrives out of order. Now a gate checks the order. And accounting looked empty — the default chart of accounts was only ever created by the tests.

Measured

RLS policies in production

158

ACL rules

210

Tests

~1,800

ADRs

~350

The niiko repository · 22/08/2026