Offer 03
AI tools turn an idea into something tangible in hours or days, and that is a very good way to start.
We start from that material to build the MVP, the first genuinely usable version.
Case study
Internationalising the B2B e-commerce catalogue runs on an LLM in production, with search rankings preserved and spend measured model by model.
The catalogue is kept up to date continuously and only the delta is re-translated. English search rankings are preserved, URLs stay stable, and AI spend is measured model by model so it can be optimised. This is exactly the work that separates a demo from usable software.
2,000+ references created then maintained in English automaticallyWhat industrialising it delivered
Other software where AI and scale are held over time: automated listing distribution and AI-generated SEO summaries at OFIM and bulk send orchestration at Payboxmail.
Gaining productivity, automating a process, improving conversion or launching a new service. You have seen where AI could create value in your business.
Screens, journeys, automations: a prototype exists, and it says more than a requirements document ever would. It made the idea concrete.
Real data, several clients, integrations with your tools. At that point, some decisions become structural.
Nothing built yet? Then we start from the idea and the need: see the Custom development offer.
How we work
We keep what deserves to be kept. We challenge the shortcuts the prototype took. We make the choices that commit the rest of the project. Reusing the existing code is not always the right answer. The value of your prototype often lies elsewhere: the journeys, the business rules, the trade-offs already made.
Screens, journeys, automations, implicit business rules. We read the intent, flag the inconsistencies and question what was assumed.
Architecture, data model, tenant isolation, identities and permissions, APIs, infrastructure, dependencies on AI models. The decisions that commit the rest.
A deliberately narrow scope, but genuinely usable by real users. Enough to validate the value in the field and prioritise what comes next.
Every change goes through the same filter: architecture, data, security, performance, costs. We move fast with AI, without letting debt move just as fast.
Monitoring, availability, backups and recovery, scaling, compliance. And usage costs measured then optimised, because AI software costs more the more it is used, and committing choices are best made early to keep risk and technical debt in check.
The point is neither to rewrite everything nor to keep everything. It is to make the choices that commit the rest, then to hold them at every iteration.
A first version usable by real users, built from your prototype. With the structural decisions made and documented, and a frame that holds at every iteration that follows.
from 2 weeksDelivered with it
These are not three sizes of the same software. They are three levels of demand
The goal: make the idea tangible. Little time, little expertise required, and plenty of decisions that can still be deferred without consequence.
The glass of water
The first genuinely usable version, in the hands of real users. The scope can stay small: it is the nature of the choices that changes. Architecture, data, tenant isolation, permissions, APIs, infrastructure, costs.
The bucket
The level of demand climbs again: monitoring, availability, backups and recovery, performance, scaling, continuous security, compliance, cost optimisation, maintenance.
The water tanker
Firefighters put it well: a glass of water in the first minute, a bucket in the second, a tanker in the third. A decision corrected late rarely costs what it would have cost early.
Some decisions carry a cost of reversibility that climbs very fast. Spotting them at the right moment costs far less than catching up later.
In a single-user demo, separating data looks secondary. As soon as several clients use the software, it becomes fundamental.
In a prototype, a direct call between two components is more than enough. Once other systems start depending on the software, the interfaces become structural.
Changing a schema with a handful of test records is easy. The same change after months of use, plenty of volume and several integrations becomes a project in its own right.
Settling an architecture once does not settle what follows. A feature added very fast can undo in one iteration what was decided at the start.
A change can short-circuit the intended APIs, duplicate a business rule or break isolation between clients. Often with nothing to signal it.
Performance that degrades, one dependency too many, an AI model cost that climbs, a future migration that becomes far harder.
We use AI to iterate fast. Every change is decided against the architecture, the data, security, performance and costs.
The speed of AI is an advantage, provided it does not let debt pile up at the same speed.
Cybersecurity
984/1000 CyberVadis Platinum medal · Mature level
An objective proof of cybersecurity maturity for your applications, B2B platforms and business-critical digital tools.
Discover our commitmentBeyond development, we make sure the project stays solid, easy to evolve and under your control.
CyberVadis Platinum Medal · 984/1000 Contact our expertsSource code and documentation delivered continuously, with nothing held back and no lock-in. Your teams can take over what we build.
Our developers work with AI coding agents, under human review and within a structured engineering framework: CI/CD, tests, development standards and documentation.
984 out of 1000 in the CyberVadis assessment. On projects: code and dependency analysis at every delivery, automated OWASP tests and OpenVAS scans.
See the details of the CyberVadis assessment →A dedicated team, trained on your application and your ecosystem, that learns your context as the project progresses and records it in maintained documentation.
A clear architecture, development standards and maintained documentation, so your application can evolve without starting from scratch with every new requirement.
Scoping, build, production, maintenance, evolutions and modernisation: GDN stays engaged over the long term, with no break in accountability and a one-year warranty included.
Francofa-Eurodis (Rexel Group)
B2B distribution / e-commerce
From a scattered file-building process to a guided, secure, traceable registration journey, automatically integrated into the ERP.
View the case study
Hightekers Group
Freelancing with all the benefits of employment
InternationalAn end-to-end business system to support rapid growth, industrializing and securing the entire consultant lifecycle, from registration to payroll, and making financial flows reliable at scale.
View the case study
Payboxmail (Verifone Group)
Multichannel remote payment
InternationalFrom a proven application to a modular, robust and secure web application, redesigned from mobile to desktop, where all business data flows through a single, validated, secured path.
View the case study
Francofa-Eurodis (Rexel Group)
B2B distribution / e-commerce
From a commercial relationship carried by phone and branch to an online sales channel that extends the ERP, with each professional client's negotiated pricing.
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OFIM
Multi-agency real estate, internationally
InternationalFrom a fast-growing network across three territories to a single digital platform that carries the entire real estate business and multiplies the reach of every listing, with no re-entry.
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Annealsys
B2B - Semiconductor equipment
InternationalFrom a site already central to the sales relationship to a genuine commercial tool: a catalog detailed to an engineer's standard, enquiries that arrive already qualified, and every visitor pointed to the right contact, anywhere in the world.
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Cordia (Rexel Group)
Fire safety / E-commerce
InternationalFrom a French-only B2B e-commerce site to an internationalized shop, kept continuously up to date with the support of AI, with no new database to administer, preserved SEO and controlled cost.
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Cordia (Rexel Group)
Fire safety / E-commerce
InternationalFrom order taking carried by direct channels to a complete online workspace, where every professional client finds their pricing, their quotes, their outstanding balance and their invoices.
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ALMA
Self-propelled grape harvesters
InternationalFrom a rich but demanding parts catalog to a shop that only shows parts compatible with the client's machine, across a worldwide fleet.
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Francofa-Eurodis (Rexel Group)
B2B distribution / e-commerce
From a proven PrestaShop 1.6 foundation to PrestaShop 9, running on a fully supported version of PHP, with every business customization preserved.
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Hightekers Group
Freelancing with all the benefits of employment
InternationalFrom a critical process at the heart of the business to a structured, traceable business system, manageable at scale.
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Payboxmail (Verifone Group)
Multichannel remote payment
InternationalFrom a proven background engine to event-driven, prioritized, fair orchestration that absorbs spikes of massive sends without one merchant penalizing another.
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Hightekers Group
Freelancing with all the benefits of employment
InternationalFrom a proven monolithic foundation to a domain-oriented architecture, opened up via API and kept under in-house control, without any service interruption.
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MCB
Parts & accessories for concrete batching plants
A B2B e-commerce platform rethought from the ground up, reliable and well protected, taking over from an end-of-life foundation without losing a single piece of data: a catalog open to search engines, a professional area reserved for approved accounts.
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Hightekers Group
Freelancing with all the benefits of employment
InternationalFrom an already solid platform to a stronger level of access security, simple to activate and backed by a real safety net, right up to the most sensitive accounts.
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Francofa-Eurodis (Rexel Group)
B2B distribution / e-commerce
From back office access protected by a password to flexible multi-factor authentication, enforceable on everyone, with no external dependency and without ever locking an administrator out.
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Cordia (Rexel Group)
Fire safety / E-commerce
InternationalFrom handing out visuals case by case to a self-service retrieval space, governed by client entitlements and mirroring the catalog.
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Ammonitia
Rental management & wealth advisory
From standalone tools sitting side by side to a shared, centralized, manageable web system, bringing the three business units together around a single repository.
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CT49
Vehicle inspection centers
From booking appointments by phone to self-service online booking, available around the clock, shared across several centers and open to partner garages.
View the case studyA prototype, an automation, a few screens that show the idea: that is a far better starting point than a requirements document. Show us what you have built, and we will tell you how to build on it.
Take my prototype to an MVP