Request a quote

Service 03 · Custom application development

.NET development in Strasbourg, for your projects and your teams.

We write .NET for our own products and for our clients. At a fixed price for complete software, by the day to reinforce your team or your agency, with the code, the tests and the documentation.

Discuss your project

First conversation free.

01/Who it is forThree situations

When custom .NET makes sense

Standard software is no longer enough, or your team is short of hands on a technology it already knows: that is where we come in.

  1. 01

    A need the market does not cover. The way you work does not fit any generic software. We build the tool that matches your line of work, and you keep its code.

  2. 02

    A team or an agency that is short of hands. We take on a work package or extra capacity by the day, on a written scope, with a report of what has been done. Your client remains your client.

  3. 03

    An old application to modernise. A desktop application or an old .NET site that nobody dares touch any more: we take it over and migrate it in stages to a web application, without shutting everything down.

02/The deliveryCode, tests, deployment

Code that holds up under load, delivered with its pipeline

We develop in ASP.NET Core, with Entity Framework Core and PostgreSQL, in a layered architecture that tests check on every build: no layer can bypass another. The aim is not to deliver fast and badly, it is to deliver software you can keep developing for years. We connect your existing systems (accounting, payments, directories, third-party interfaces) and document what we build, so that you are never locked in with one supplier.

What you receive

  • Tested code: unit tests and integration tests against a real database
  • A layered architecture, checked automatically on every build
  • Technical and functional documentation
  • A Docker image and automated release to production
  • A three-month warranty after release to production
03/The evidenceThree .NET 10 applications in production

What we run ourselves on .NET 10

We sell what we practise: three complete applications, written in ASP.NET Core on .NET 10, hosted and operated by us.

04/Frequently asked questionsThree questions

Fixed price, day rate, takeover

  • Fixed price or day rate?

    At a fixed price, the scope, the price and the schedule are written into the quote. By the day, you decide what each day is spent on and we invoice the days actually worked, with a report. Rates are published on the pricing page.

  • Can you take over an existing .NET application?

    Yes, it happens often. We start with an audit of the code and the infrastructure, hand you a clear report, then move on to maintenance or a gradual rebuild, without breaking everything at once.

  • Do we have to host with you?

    No. The software can run on your servers or on ours. With us, it is monitored, backed up every night and covered by on-call support; the details are on the hosting page.

05/Further readingTwo related services
01 · Custom software developmentThe full approach, for a manager who is starting from a need.05 · Managed services for servers and applicationsWe maintain the code as well as the infrastructure, with one party responsible.

Timelines, quotes, code ownership, end of contract: the answers are in the FAQ.

Quoted per project. Price ranges are published on the pricing page, along with what makes a budget vary.

06/Our tools29 technologies

The tools behind every delivery

From the code to the monitoring probe: open source, on servers we administer ourselves, in France.

Development10

  • Next.js
  • React
  • TypeScript
  • .NET
  • Node.js
  • PostgreSQL
  • MariaDB
  • Playwright
  • Claude
  • ALTCHA

Infrastructure19

  • Proxmox VE
  • Debian
  • OVHcloud
  • Docker
  • Traefik
  • Forgejo
  • Ansible
  • Grafana
  • Prometheus
  • Uptime Kuma
  • Matomo
  • mailcow
  • Let's Encrypt
  • WireGuard
  • Authentik
  • CoreDNS
  • Warpgate
  • Termix
  • Wazuh

Let us talk about your application

A .NET project, a takeover, extra hands?

Describe what you need in a few lines. We will tell you what is feasible, in what form and at what price.

Discuss your project

Reply within 24 working hours, from one of the two founders.