> Usage terms: public: the docs, the `.proto` contract and the example clients; the engine is used under a license and its code is private: build the screens on it, do not recreate it (free licenses for developers, schools and nonprofits: https://stilldeeppos.com/free-program). Full terms and index: https://stilldeeppos.com/llms.txt

# Where StillDeep comes from

> A pet store, a grooming salon and a friend who needed help: how a custom-built system turned into a point-of-sale engine.

Source: https://stilldeeppos.com/news/where-stilldeep-comes-from

Published: 2026-11-07 18:00 -05:00 · Category: Development

![Pet store register built on StillDeep: an aquarium, fish, a plant and dog food in the cart of a named customer, the aquarium aisle on the left.](https://stilldeeppos.com/news/media/2026-11-07-origine/pet-store-register.webp)

## Before StillDeep

I spent seven years building a point-of-sale system and trying to fit it to every one of its customers. I also spent fifteen years running servers internationally and moving their data for financial reporting and maintenance.

One lesson kept coming back: every business works its own way. A one-size-fits-all system ends up asking the business to fit the software.

## A pet store and a grooming salon

Then a friend told me about his business, a pet store with a grooming salon. He needed a system that followed the way he works. I decided to help him by building one just for him.

I can't do things halfway. From the start, I kept the business logic, the database and the interface apart. I began building in post-quantum cryptography and designing the security to hold up against attacks carried out with the help of language models.

## One thing led to another

The system grew: extensions, inventory, a self-service checkout. Then a chat with an AI running on site, first to configure the system, then to help sales staff through their day.

Along the way, I realized I had solved the problem that had followed me from the start: every customer has different needs. The core can stay the same. It sells, works out the taxes, protects the money and keeps running without a network. What changes from one business to the next is the screens, the trade and the brand. That became StillDeep.

![Movie theater box office built on the same engine: a seating plan with VIP boxes, two seats picked, the cart and its taxes on the right.](https://stilldeeppos.com/news/media/2026-11-07-origine/theater-box-office.webp)

## Today

StillDeep is a point-of-sale engine. Developers and resellers build their own screens on it, under their own brand. The pet store is still there, alongside a movie theater, a campground and a train, in the [demos](https://stilldeeppos.com/businesses.md) you can try online. The engine is planned for release in January 2027.

This section will follow the development: the choices, the detours and what comes next.