Freelance developer in Valenciennes
Business software, mobile apps and websites — designed and built from Valenciennes, available throughout the Hauts-de-France region and beyond.
Cambrai · Douai · Lens · France
An independent developer rooted in the Valenciennes area
Based in Valenciennes for over twenty years, I work mainly with companies across the Nord and Hauts-de-France: industrial SMEs, start-ups, non-profits, local authorities. A wide range of sectors — retail, logistics, healthcare, services — but always the same approach: understand first, code second.
Proximity matters. When we work together, we can meet in person. No endless conference calls to explain a need that two hours face to face would settle. I travel to Valenciennes, Anzin, Marly, Saint-Saulve, Denain, Maubeuge, Cambrai, Douai, Lens, and across the whole Hauts-de-France region. For projects that warrant it, I'm also available throughout France.
Hugues Dehen, independent freelance developer — not an agency, not a middleman. You deal directly with the person who writes the code, picks up the phone and stays available six months after delivery.
What I do in Valenciennes
- Custom business software and internal tools (.NET / C#)
- iOS & Android mobile apps (Flutter)
- Websites, platforms and APIs (ASP.NET, PHP, Node.js)
- Data integration and ETL (Semarchy xDI, formerly Stambia), Mirakl connectors
- Taking over and modernising existing code
- Software architecture and technical consulting
- Performance diagnosis and debugging
Based in Valenciennes, available across Northern France
Valenciennes & surrounding area
Anzin, Marly, Saint-Saulve, Aulnoy-lez-Valenciennes, Denain, Condé-sur-l'Escaut, Saint-Amand-les-Eaux — the whole Valenciennes Métropole. Fast turnaround, on-site meetings available.
Hauts-de-France
Maubeuge, Cambrai, Douai, Lens, Lille, Arras — regular visits depending on the project's needs.
All of France
Remote work or occasional travel — most engagements can be handled entirely remotely.
The concrete advantages of working with a developer from the region
Genuine responsiveness
Same time zone, same work culture. An urgent request gets an answer the same day.
In-person meetings
When face to face works better — scoping, demos, training — I travel to Valenciennes and the surrounding region.
A single point of contact
No agency, no subcontracting. You talk directly to the developer working on your project.
20 years of practice
Projects delivered for companies in Northern France and beyond — with the scars and the experience that come with them.
.NET developer & custom software
This is my core business and the angle few local providers cover: .NET/C# development, custom business software, data integration (Semarchy xDI ETL, formerly Stambia) and Mirakl marketplace connectors. Where web agencies stop at the showcase site, I build the tools that run your business.
See the dedicated page: .NET developer & custom software in Valenciennes & Northern France, or the .NET / C# development service.
Freelance web & mobile in Valenciennes
Need a website, a platform or a mobile app? I build high-performance showcase sites, client portals, in-browser business applications, custom APIs (ASP.NET Core, PHP, Node.js) and iOS/Android apps in Flutter — a single codebase, two stores, native performance.
Dedicated pages: freelance web developer in Valenciennes · freelance mobile developer in Valenciennes.
Freelance developer in Valenciennes: your questions
How much does a freelance developer in Valenciennes cost?
The price depends on the project, not on a fixed package. It is billed either on a daily rate or as a fixed project quote. As a guideline, expect between €400 and €600 per day for experienced .NET or mobile development in the region, and a fixed quote for a clearly scoped need. I quote for free after an initial conversation — you pay the developer who writes the code, with no agency margin.
Freelancer or web agency: which should you choose?
An agency means a team, a salesperson, a project manager — and an invoice that absorbs that structure. An experienced freelancer is a single point of contact: the one who codes, decides and answers you directly. When proximity, responsiveness and technical mastery matter more than headcount, a freelancer often offers the best value. For a very large multi-disciplinary project an agency can make sense — and I can also join an existing team.
Do you work remotely or on-site?
Both. Most engagements work very well remotely (video calls, Git, regular check-ins). But when scoping, a demo or training is better done face to face, I travel to Valenciennes and across the Hauts-de-France. That is the advantage of a local developer: meeting when it matters, without it becoming an expedition.
Which towns around Valenciennes do you cover?
I work with companies across the Valenciennes area and Valenciennes Métropole: Anzin, Marly, Saint-Saulve, Aulnoy-lez-Valenciennes, Denain, Condé-sur-l'Escaut, Saint-Amand-les-Eaux, as well as Maubeuge, Cambrai, Douai, Lens, Lille and Arras. For projects that warrant it, I work throughout France.
What kind of projects do you build?
Custom business software and internal tools in .NET/C#, iOS and Android mobile apps in Flutter, websites and web platforms, APIs, plus data integration (Semarchy xDI ETL, formerly Stambia) and Mirakl marketplace connectors. I also take over existing code to modernise or debug it. If your need falls outside these boxes, let's talk — after 20 years, I have rarely seen two identical projects.
A project in Northern France?
Describe your need — reply within 48h, free quote with no obligation.