.NET developer and custom software in Valenciennes & Northern France
Business software, data integration, marketplace connectors: the .NET/C# development that runs your company, where web agencies stop at the showcase site.
The blind spot of local web agencies
Across the Valenciennes area and the Nord, there are plenty of WordPress studios and "showcase site" agencies. Great for an online presence. Far less so for the internal tool that manages your orders, syncs your stock or makes two systems that ignore each other talk. That is exactly where I come in.
Twenty years of .NET/C# development, much of it in data integration for retail and e-commerce. I build robust business software, connect your systems (ERP, marketplace, warehouse, accounting) and automate what wastes your time.
A single point of contact, based in Valenciennes, available on-site across the Hauts-de-France and remotely throughout France. No middleman between you and the code.
What I build
- Custom business software and internal tools (.NET / C#, ASP.NET Core)
- Management apps, WPF and Windows services
- Data integration and ETL: Semarchy xDI (formerly Stambia)
- Mirakl marketplace connectors (retail, e-commerce)
- REST APIs and system interconnection (ERP, PIM, accounting, warehouse)
- Migration and modernisation: .NET Framework to modern .NET
- Automation of repetitive tasks and takeover of existing code
Real engagements, not slogans
Connecting an ERP to a marketplace
A distributor who wants to sell on a Mirakl marketplace without re-keying catalogue, stock and orders by hand: I build the connector that syncs everything automatically, both ways.
Migrating an ETL from Stambia to Semarchy xDI
Legacy Stambia integration flows to move onto Semarchy xDI without breaking production: mapping, batch migration, double run, testing. A rare skill, with no local competition.
Replacing a critical Excel file with a real tool
The shared file everyone opens, breaks and saves twice: I turn it into a reliable multi-user .NET application, with a database, permissions and history.
Automating repetitive tasks
Imports, exports, reconciliations, reports sent by hand every week: a .NET service that runs on its own, at night, and gives you hours back every month.
Why this niche, why me
Data integration and business software cannot be improvised. You need to know the tools (Semarchy xDI, Mirakl, ASP.NET Core), but above all to understand the business behind the data: where it comes from, what it must become, what breaks when it is wrong.
That is what I have done for 20 years, notably in retail. A .NET project, a flow to integrate, a marketplace to connect? Let's talk — the first conversation and the quote are free.
A .NET need in Northern France?
Describe your project — reply within 48h, free quote with no obligation.