Web + Mobile + API
YouggyDrome
One .NET back-end serving a web front and a Flutter app.
The freelancer
Hugues Dehen,
Hugues Dehen,
freelance developer and consultant.
I design .NET/C# software, Flutter apps and data integrations. Based in Raismes, near Valenciennes, I work directly from scoping to delivery, with experience in retail and e-commerce.
I believe good software is measured by what it lets you forget: the tech.
No over-engineering, no hype-driven choices. I pick proven tools, write clear code others can pick up, and always keep in mind the person who'll use the product every day.
My strength: you work directly with me, the expert, at every step. No middleman, no project manager relaying to a junior developer.
Tech stack
Tools of the trade.
Core languages
●C#
●Dart (Flutter)
●TypeScript
●JavaScript
●PHP
●SQL
●Python
Frameworks & platforms
●.NET / ASP.NET
●WPF
●Flutter
●React
●Vue.js
●Angular
●Node.js
●Laravel
Infra & tools
●SQL Server
●PostgreSQL
●Docker
●Git / CI-CD
●Azure
●Semarchy xDI
●Stambia
●Mirakl
●Figma
What the tools enable
A durable foundation
Choices that remain readable, testable and transferable to another team.
A coherent experience
Web, mobile and back-end move forward around the same business need.
Observable production
Logs, tests and automation to understand before fixing.
AIArtificial Intelligence
LLM integration into your products.
Chatbots, autonomous agents, content generation, document analysis — I integrate AI APIs into your software and mobile apps.
●OpenAI / ChatGPT API
●Anthropic / Claude API
●Google Gemini API
●RAG & embeddings
●LangChain
●Fine-tuning
●Prompt engineering
●MCP (Model Context Protocol)
Data integration
Freelance Semarchy xDI & data integration consultant.
Beyond .NET development, I work as a freelance Semarchy xDI consultant (formerly Stambia) and data-flow developer for retail and e-commerce companies: clean mapping design, legacy flow recovery, and Stambia-to-Semarchy xDI migration.
ETL
Semarchy xDI / Stambia
High-performance E-LT flows, industrialised templates, recovery and migration of existing platforms.
MDM
Semarchy xDM
Freelance Semarchy xDM MDM consultant: golden record, matching, survivorship and master-data quality.
MKT
Mirakl & marketplace
Freelance Mirakl integrator: catalogue, offer and order sync between back-office and marketplace.
Code you can see
Three proofs, three real constraints.
Two personal projects, explained decisions.
These studies explain my role, constraints, trade-offs and code verification. They show how I work on personal products.
Domains
Varied sectors, the same standard.
01
SMEs & industry
Management tools, production tracking, digitalisation of internal processes.
02
Startups & scale-ups
MVPs, fast prototypes and platforms that need to scale.
03
Freelancers & NGOs
Sites, mobile apps and simple tools on a controlled budget.
Values
—
Eco-aware
Lean, performant code built to last.
—
Agility
Fast adaptation to changing requirements.
—
Rigour
Tests, code reviews, clean documentation.
—
Transparency
Clear progress, direct communication.
FAQ
Common questions about the expertise.
Who do clients work with during an engagement?
You work directly with Hugues Dehen, from scoping through production. There is no sales intermediary and the project is not handed off to a junior profile.
Which data-integration skills are covered?
The expertise covers Semarchy xDI and xDM, Stambia, Mirakl, ETL/ELT architectures, MDM, SQL Server and PostgreSQL, with particular experience in retail and e-commerce environments.
Can you modernise an older .NET application?
Yes. A takeover starts by analysing dependencies, risks and test coverage. Migration can then proceed gradually so service is maintained and every step remains verifiable.
Can an engagement integrate with an existing team?
Yes. The work can be autonomous or carried out with your developers, data teams and business stakeholders, including documentation, code reviews and knowledge transfer.
"Binary is just 0s and 1s. The whole craft is arranging them so they serve someone."— Hugues Dehen, founder of Sculpture Binaire
Shall we work together?
Your project deserves a real craftsman.
Describe your need — I'll tell you honestly whether I'm the right fit.