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From a prototype, thought through and scoped, to a production web application that is complete, reliable, scalable and secure

We combine the power of AI with the rigour of our engineering to turn your ideas and business needs into reliable, secure and scalable web applications, from 2 weeks.

Let's talk about your project See a case study

Case study

From the business need to a web application that carries the growth

A business system built end to end, which industrialises a consultant's whole life cycle, from sign-up to payroll.

Hightekers Group

A single business backbone, from sign-up to payroll

Software built to carry rapid growth: workflows chained status after status, financial flows traced, volumes absorbed in the background. And control of the system kept in-house.

4,000+ independents supported, from sign-up to payroll

What the web application delivered

  • A single business backbone, across the consultant's whole life cycle
  • Reliable, traceable financial flows, from invoicing to payroll
  • Workflows chained without shortcuts, status after status
  • Volumes absorbed by background processing, with no service interruption
  • Control of the system kept in-house
More details

Other web applications built end to end: the multi-centre online booking system at CT49, OFIM's multi-country property platform and Annealsys's site, from technical catalogue to qualified leads.

This is for you if

No off-the-shelf product fits

You have looked. The existing solutions impose their own model, and you would have to bend your business to fit inside them.

A spreadsheet has become critical

A spreadsheet or a patched-together tool runs part of your business. Nobody is comfortable, and yet everybody uses it.

The idea is clear, the path is not

You know what the tool should do. You do not know where to start, nor what needs building first.

Already have a working AI prototype? Then we start from that material rather than a blank page: see the AI prototype industrialisation offer.

How we work

What matters is decided on day one

The difference between a prototype that impresses and a web application that holds in production comes down to what goes under the hood from the start: tests, security, documentation, continuous integration.

First working version Design & scoping AI-assisted development Human in the loop CI/CD & tests API-first
Launch my first version
  1. 01

    Scope what matters

    The first use case, the real users, the assumptions worth testing. A realistic trajectory from 3 days.

  2. 02

    Build it properly

    Modern architecture, CI/CD, automated tests, security and documentation. No shortcut we would pay for later.

  3. 03

    Deliver a real version

    A first working version, used by real users, from 2 weeks.

  4. 04

    Hand you the keys

    Source code and documentation delivered continuously, with no lock-in. You can take the project back, or keep us.

The power of AI, in a controlled frame

Our developers work with AI coding agents: that is what makes us fast. The frame around them is what spares you the throwaway code those tools produce when nobody is watching them.

AI-assisted development

Supervised code generation, AI-assisted code reviews and documentation, gradual automation of development. We move in small cycles, never in big leaps.

Systematic human control

Human in the loop: nothing ships to production because an AI wrote it. A senior developer decides, reviews and owns every release.

Automatic guardrails

Automated tests, static analysis, CI/CD, version and release management. Whatever slips through too fast is caught by the machine before it reaches you.

Development rules Memory banks: documented context for the AI Small cycles Assisted code reviews Automated tests Static analysis & PHPStan CI/CD Versions & releases

You end up with a tool you own

A first working version, clean and documented, on which your future developments will start from a sound base.

★ The flagship asset

A working version, actually used

Clean, secure and documented, not a fragile demo. It serves as the base: every later change starts from sound ground, and you can take the keys overnight.

from 2 weeks

The complete package, delivered

  • Source code delivered continuously, with no lock-in
  • CI/CD, automated tests and security built in
  • Complete business and technical documentation
  • A live demo and an evolution plan for what comes next
  • A base ready for what follows, not a technical dead end

Cybersecurity

CyberVadis Platinum medal, 984/1000, Mature level

An objective proof of cybersecurity maturity for your applications, B2B platforms and business-critical digital tools.

Discover our commitment

What sets us apart

Beyond development, we make sure the project stays solid, easy to evolve and under your control.

CyberVadis Platinum Medal · 984/1000 Contact our experts
  1. 01

    You stay in control of your tools

    Source code and documentation delivered continuously, with nothing held back and no lock-in. Your teams can take over what we build.

  2. 02

    AI development on solid foundations

    Our developers work with AI coding agents, under human review and within a structured engineering framework: CI/CD, tests, development standards and documentation.

  3. 03

    Security at the core

    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 →
  4. 04

    A team that builds on your business knowledge

    A dedicated team, trained on your application and your ecosystem, that learns your context as the project progresses and records it in maintained documentation.

  5. 05

    Your tools stay easy to evolve

    A clear architecture, development standards and maintained documentation, so your application can evolve without starting from scratch with every new requirement.

  6. 06

    Continuous accountability

    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.

Case studies

They trusted us with their projects

All case studies
Francofa-Eurodis (Rexel Group)B2B distribution / e-commerce Application for digitizing B2B client registrations 8,000+registration files processed See the case study Hightekers GroupFreelancing with all the benefits of employment Managing an entire consultant network, from secure onboarding to payroll 4,000+independent consultants supported, from registration to payroll See the case study Francofa-Eurodis (Rexel Group)B2B distribution / e-commerce B2B e-commerce platform and client self-service, backed by the ERP 30,000+products orderable online, at each client's negotiated price See the case study OFIMMulti-agency real estate, internationally A single back office with built-in CRM to run a multi-agency real estate network From data entry to sales follow-upa single tool for the daily work of the network's agencies and sales agents See the case study Process IDB2B web application publishing Modernizing a critical payment application, without interruption Every daythousands of remote payments sent and secured See the case study Cordia (Rexel Group)Fire safety / E-commerce B2B e-commerce platform and client workspace, backed by the ERP 10,000+professional accounts served, each at their negotiated price See the case study AnnealsysB2B - Semiconductor equipment A bespoke website, from technical catalog to lead generation Every machinepresented with its applications, specifications and documentation, in the visitor's own language See the case study OFIMMulti-agency real estate, internationally A real estate platform, from public site to automated listings 20 agencieson one digital foundation: Reunion, Mauritius, Madagascar See the case study Cordia (Rexel Group)Fire safety / E-commerce Continuously internationalizing a B2B e-commerce site 2,000+references created then kept up to date in English automatically See the case study ALMASelf-propelled grape harvesters Filtering spare parts by machine serial number 30+ countriesa worldwide fleet filtered by serial number See the case study Francofa-Eurodis (Rexel Group)B2B distribution / e-commerce Upgrading a heavily customized platform from PrestaShop 1.6 to 9+ From 1.6 to 9+the PrestaShop path completed without losing a single business customization See the case study Hightekers GroupFreelancing with all the benefits of employment Complete travel expense management tool Several thousand tripschecked and reimbursed, from entry to payment See the case study Hightekers GroupFreelancing with all the benefits of employment Modernizing the legacy system toward an API-First architecture 150API endpoints delivered progressively, without disruption See the case study MCBParts & accessories for concrete batching plants Turning an end-of-life B2B e-commerce platform into a modern, secure store Zero re-entrycatalog and customer accounts fully migrated See the case study Hightekers GroupFreelancing with all the benefits of employment Integrating two-factor authentication (2FA) via a mobile app Thousands of accountsprotected by a second factor, with no dependency on SMS or email See the case study Francofa-Eurodis (Rexel Group)B2B distribution / e-commerce Adjustable multi-factor authentication Every loginto the back office protected by a second factor See the case study Cordia (Rexel Group)Fire safety / E-commerce Self-service B2B media library module The entire catalogin HD visuals and documents, self-service See the case study AmmonitiaRental management & wealth advisory Modernizing the Investors Department's business application 3 unitsbrought together in a single repository See the case study CT49Vehicle inspection centers Online vehicle inspection booking platform, multi-center and multi-actor 24/7self-service online booking, with no phone call needed See the case study

Show us what you already have

A spreadsheet, a mockup, a screenshot or three pages of notes: that is a better starting point than a requirements document.

Launch my first version

See all six offers