Roux du Toit

I build systems that run without me.

Three exits, an operator's scars, and a habit of finishing the unglamorous part: the handover. The measure of a system is whether it holds once you leave the room.

built
runs today · in use · fully offline

staedy.com

Reads a tax firm's DATEV export and finds money left on the table: Stromsteuer § 9b, Energiesteuer § 54, Forschungszulage, double payments. It runs entirely on the advisor's own machine. No AI in the arithmetic, no server, no upload: zero outbound connections, checkable in the network tab, works with the cable pulled out. Every figure is computed deterministically and traced back to the paragraph of law it came from. The advisor approves and files. staedy.com never files.

verified · 25 statutory years

The compute layer underneath it

Calculators generated from the German finance ministry's own published pseudocode rather than transcribed by hand, because transcribing it by hand gets the decimals wrong. Exact decimal arithmetic, no floating point. Every figure carries its paragraph and the hash of the source it was generated from. Checked against an independently written implementation: 100.000 field comparisons, zero deviations, on value and on scale.

geschäftsführer · combyne gmbh · turnaround

A leadership layer rebuilt in ninety days

You cannot rebuild a leadership team by hand. The whole job is getting other people to own outcomes, and then not taking them back.

gründer · exit

Thirty-three stores, handed over, held

Due diligence, negotiation, compliance, and the part most people skip: the handover. Independent operators across a country, systems and all. It held without me.

now

staedy.com is one calculator, one document type, one firm. It proves the architecture holds and that a practice will pay for it. What it does not have is a layer to run on.

For a single firm that layer never pays back. Across thirty locations it obviously does. So I am building the layer: the operations tier for regulated professional work, where confidentiality law means anything touching client data stays inside the firm, and every figure must be traceable to the statute that produced it.

It prepares and it proves. It does not sign.

A specification with a built, verified core. Not a product on the market.