Custom application development in Paris

Business applications, ERPs, internal tools, web and mobile apps: we build the tool that fits how you actually work, from design to production. From €8,000 excl. VAT.

Business apps Custom ERP Internal tools Web & mobile App takeover

Book 30 minutes or describe your need in writing

What we build

Tools built around your business

ERP and sales management

Quotes, orders, follow-ups and finance in a single tool. On one of our projects, processing an order now takes 75% less time.

Replace Excel with a real application

When shared spreadsheets become unmanageable: one database, role-based access, fewer data-entry errors.

Web and mobile applications

For your customers or your field teams. For example, a kitchen interface connected to a fast-food chain’s ordering system.

Taking over an existing application

We take over an app built by another provider and bring it up to date. On one of our projects, the hosting bill was cut by 50%.

Investment · from

€8,000 excl. VAT

For a first version with a defined scope. The budget depends on the number of screens, integrations and users.

Precise quote after a first 30-minute call

You own the code from delivery

Maintained by your team or by us, your choice

Book 30 minutes

Method

How we work

Immersion

We watch how the work really gets done: which files, in what order, and why. The tool builds on your habits, not against them.

Design

Screens are designed and approved in Figma before the first line of code.

Development

The application is built module by module, so you see a concrete result early.

Production

Launch, onboarding of your teams, then maintenance by your team or by us.

Reference projects

Our applications

PCB Electronics

Support for PCB Electronics in the implementation of a custom ERP.

PCB Electronics is a company specialized in the distribution of electronic components.…

-75% time to process an order View the project

Orfus

Orfus develops process optimization software for the kitchen operations of fast-food chains (McDonald’s, Burger King, etc.).

MVP live in Burger King kitchens View the project

Immoshoot

Immoshoot is a mobile application and a custom CRM for real estate. Fenxi took over the project to modernize it: migration to the latest versions of Symfony…

Hosting bill cut in half, 500 € a month View the project

See all projects

Frequently asked questions

How much does a custom application cost?

From €8,000 excl. VAT for a first version with a defined scope. The price depends on the number of screens, integrations with your tools and the number of users. We break down the ranges in how much does a custom business application cost.

Custom or off-the-shelf software: how to choose?

If existing software covers most of your needs, it is often the sensible choice. Custom development pays off when the way you work is your edge, or when you are stacking tools that don’t talk to each other. See SaaS vs custom development.

Can you take over an application built by someone else?

Yes. We start by reading the code and mapping the infrastructure, then bring it up to date without interrupting the service.

Who owns the code?

You do, from delivery.

Who maintains the application once it is live?

Your team if you prefer (we document everything and hand over), or us, under a maintenance contract.

Tell us about your project

30 minutes to understand what you need and see whether we can help.