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Your enterprise applications in .NET and C#

APIs, business software, and calculation engines: our developers design your .NET projects, take over your existing code, and evolve it to the current versions of the platform.
More than 40 developers practise C# and .NET
From .NET Framework to .NET 10, migrations carried out under test coverage
.NET APIs in production for FNTP, Sadies or Cyrus Herez
Discuss my .NET projectDiscover 3 achievements
ASP.NET Core controller open in a code editor
+800 organisations entrust us with their tech and AI projects
[why .net]

Why choose .NET?

Microsoft's development platform, .NET has been open source and cross-platform since .NET Core. With C#, ASP.NET Core and Entity Framework, it offers a powerful and well-equipped foundation for enterprise applications, on Windows as well as Linux.
01

Designed for enterprise

ASP.NET Core for web and APIs, Entity Framework for data, native integration with Azure and Microsoft 365.
02

High performance

C# code is compiled and optimised at runtime: ASP.NET Core is among the fastest web frameworks.
03

C#, a typed and mature language

Strict typing, asynchronous programming, LINQ queries: a language that makes code safe and readable over time.
04

Long-term support

Each LTS version of .NET is maintained for three years by Microsoft: version upgrades can be planned in advance.
[Our Expertise]

What we develop in .NET

New project or application in production for years, we intervene at every stage of your software's lifecycle.
APIs and back-ends

APIs and back-ends

The APIs for your web and mobile applications with ASP.NET Core: authentication, background processing, connections to your tools.
Business software

Business software

Management, calculation or planning tools built around your processes, with their web interfaces.
Microsoft Integrations

Microsoft Integrations

Connection to Azure, Microsoft 365, Entra ID or SharePoint: your application fits into your teams' environment.
Migration to modern .NET

Migration to modern .NET

Transition from .NET Framework to .NET 8 or 10, containerisation and hosting on Linux, with test coverage.
[Our support]

Our method for developing your .NET application

  • Discovery
    Step 01

    Project scoping

    We start from your processes and users to define the functional scope, architecture and connections to your information system.
  • Design
    Step 02

    Interface design

    Our designers create the application screens on Figma, validated with your teams before development.
  • Development
    Step 03

    Iterative development

    Each feature is delivered to a staging environment where you test it continuously. Priorities are adjusted with each iteration.
  • Go-live
    Step 04

    Go-live

    Automated tests and continuous deployment: the application goes into production on Azure, AWS or your servers, without manual intervention.
  • Enhancements
    Step 05

    Maintenance and enhancements

    .NET version upgrades, security updates and new features: the same team stays by your side.
01/05
[Projects]

Some .NET achievements

Professional Federation
FNTP

Redesign the carbon footprint calculation software for construction sites

The National Federation of Public Works, which represents 8,000 companies, wanted to redesign SEVE-TP, its software for calculating construction site carbon footprints. Galadrim led the complete redesign of the product, whose calculation engine is exposed via a .NET 8 API, with a simplification of user journeys, and an upgrade to current environmental standards. An AI compares supporting documents to the data entered.
9 000users
8 000companies represented
200+business features
FNTP Logo
Medico-social software
Sadies

Generate healthcare staff schedules for a medico-social establishment in a few seconds

Sadies publishes the software with which medico-social establishments organise the rotations of their care teams, under 24/7 care continuity, regulatory staffing ratios and legal rest periods. Galadrim developed the planning engine integrated into the solution in .NET, which calculates in a few seconds a roster respecting all these rules and fairly distributing shifts.
200establishments covered
-70 %of planning time
6 000optimised variables per schedule
Sadies Logo
Wealth Management
Cyrus Herez

Develop the client area for the French leader in wealth management

Cyrus Herez, a leading player in wealth management consulting, wanted to allow its clients to manage their own portfolios. Galadrim developed a client portal on a .NET back-end, which visualises the distribution of investments, manages the electronic signature of documents and tracks the progress of each file. Data is aggregated via Cyrus Herez's internal API and the Powens open finance platform.
20 Md€of assets under management
10 000+clients
5 monthsof development
Cyrus Herez Logo
They talk about us
[Why Galadrim?]

Why entrust us with your .NET project

Engineers from the best schools

Engineers from the best schools

Our developers come from Polytechnique, CentraleSupélec, Télécom Paris or École 42. More than 40 of them practise C# and .NET.
The entire project team in one place

The entire project team in one place

Product managers, designers, back-end and front-end developers, cloud engineers: your application is designed, developed, and hosted by the same team.
Reviewed, tested, and documented code

Reviewed, tested, and documented code

Every modification undergoes a review and automated tests. Your application remains readable for any team that might take it over tomorrow.
The code belongs to you, the team remains available

The code belongs to you, the team remains available

You own the code and you choose its hosting. Galadrim remains available for enhancements, with 180 employees and offices in Paris, Nantes, and Lyon.
[Our team]

The engineers who develop your .NET applications

Martin Lebard
Martin Lebard Engineering Manager
Leading a team of developers, he provides technical leadership for several projects, including the complete rewrite of the ERP for Cera+Dental laboratory, which processes more than 400 orders per day for 3,500 clients.
Marc-César Garcia-Grenet
Marc-César Garcia-Grenet AI Team Lead
Develops complete applications in production and agentic systems based on Large Language Models, and advises clients on their product on a daily basis.
Axel Soll
Axel Soll Lead Developer
Embedded Software Engineer for nearly five years in industry, at Mr Beam Lasers then Micro Technic, he knows from the inside the constraints of old systems maintained in production.
Florian Ehr
Florian Ehr Tech Lead
He works on regulated platforms, where he led the redesign of Dune Assurances' business tool and the migration of its 850 clients, then the complete rewrite of Lexika's franchise management SaaS.
Surya Ambrose
Surya Ambrose Head of Engineering
Engineering Manager for four and a half years in a FinTech regulated by the AMF, he now structures Galadrim's engineering practices, after assignments for BNP Paribas Asset Management and Société Générale.

Let's bring your project to life together

Contact Us
[FAQ]

Some frequently asked questions from our clients

Not urgently: .NET Framework 4.8 remains supported with Windows. But it no longer evolves and only runs on Windows. Migrating to modern .NET opens up hosting on Linux, containers and better performance. We carry out the migration in stages, with test coverage.
An LTS version, maintained for three years by Microsoft: .NET 10 today. .NET 8 is no longer maintained after November 2026, which necessitates planning the version upgrade for applications that use it.
Yes. We audit the code, dependencies and hosting, then propose a takeover plan. Automated tests are implemented on critical paths before any modification.
No. Modern .NET runs equally well on Linux, AWS, Google Cloud or a sovereign host. Azure remains a natural choice if your information system is already with Microsoft.
Each project is quoted based on its functional scope, the expected design level and connections to your existing tools. Describe your needs to us, we will get back to you within 1 hour.
Yes. The code is versioned on your repositories from day one and you own it. It is documented so that your teams, or any other team, can take it over.
[Contact us]

Let's bring your project to life together

We work with all types of clients, across all sectors. Whether you're an entrepreneur or managing a large organisation, a tailored team will meet your needs.

Over 800 companies have trusted us to create their web, mobile, and AI products

Your enquiry

We'll get back to you within 1 hour.