We design, build
and run software.

We are a software studio. We audit code and architecture, remediate legacy systems, coach teams on software engineering, and teach Domain-Driven Design & software craft.

Contact us
Clients
BNP Paribas Michelin Eiffage Hermès EPEX SPOT Fédération Française de Rugby Fédération Française de Motocyclisme Electre

We read your codebase, measure bad patterns (coupling, cyclic dependencies, mixed responsibilities, etc) and suggest improvements. You get a diagnostic and recommendations.

Most of the software that runs a business is already written. We turn tangled codebases back into systems that accept change with behavior proven equivalent at every step. We call this approach Legacy Reclaiming.

We work inside your team, on your production code. Design sessions, pairing, reviews. Practices stick when they are learned on real work.

Three courses: Product Design, Domain-Driven Design, Production-Ready Clojure. Taught since 2022, Qualiopi certified, 4.7/5 average satisfaction.

Philosophy

How we think

Companies run on software. The quality of that software determines how easily the company can change.
We design concepts before code. Each concept names something real in the problem, means one thing, and relates clearly to the others.
We build systems from parts that can be understood and changed independently.
We favor simplicity over familiarity: it is riskier to build something complex than to learn something unfamiliar.
We start from the problem to solve and derive the features from it.
We choose boring and proven technology and focus on the design.
AI changes the way we produce code, but the fundamentals of software engineering stay the same.
Open source

We build our own tools for domain analysis, code analysis and data visualization, and we open source them as they mature.

Got a system that’s getting hard to change?

One session, your architecture, our read on it. No slides.

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