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Christophe S.CS

Christophe S.

Senior .NET Developer | C# | Azure

€500/day
Thionville, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Christophe

Senior freelance .NET developer with 13+ years of experience, specializing in C#, .NET (Framework, .NET Core, .NET 8) and business application development. I work on high-stakes projects in Azure environments, with a constant focus on reliability, maintainability, and controlled deployment.

I assist my clients with:
  • Development and maintenance of .NET applications
  • Modernization of existing solutions (legacy → .NET Core / .NET 8),
  • Design of high-performance REST APIs and backend services,
  • Application integration and system interoperability (BizTalk, OData, SAP),
  • Setting up CI/CD on Azure DevOps and preparation for Azure cloud deployment (hybrid environments, targeted containerization with Docker).
Concrete results achieved:
  • Successful critical application migrations without service interruption,
  • Stabilization of .NET applications in production with reduced incidents,
  • Improvement of maintainability and performance on existing business applications,
  • Measurable productivity gains for teams through automation.
My approach is pragmatic and results-oriented: secure the existing, deliver quickly and cleanly, evolve towards Azure when it brings real business value.
I am available for team augmentation as well as independent project management.

Key skills: .NET Developer, C#, .NET 8, SQL Server, Azure, REST API, Azure DevOps, CI/CD, Docker
Methods: Clean Code, SOLID, DDD, TDD
Languages: Fluent French, Professional English
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Thionville (up to 50km)

Experience

  • OTAN
    Senior .Net Developer
    July 2015 - Today (10 years and 11 months)
    Luxembourg, Luxembourg
    Refactoring of a complex application system, then operational maintenance and support for end-users. Missions: Migration of BizTalk Server 2016 to 2020 Development of ancillary applications (API, Frontend) Operational management
    .Net Core Biztalk SQL CI/CD Microservices
    .NET C# SQL API BizTalk Entity Framework
  • LombardOdier
    Senior .Net Developer
    BANKING AND INSURANCE
    January 2021 - August 2021 (7 months)
    Luxembourg, Luxembourg
    Context: Creation of internal tools for bank managers.

    Missions:
    - Creation of an Angular application
    - Development of .Net Core REST APIs
    Git Angular .NET C# ASP.NET
  • TotalEnergies TOTSA
    .Net Developer
    ENERGY AND UTILITIES
    May 2012 - July 2015 (3 years and 2 months)
    Toulouse, France
    Context: Digitalization of internal processes to facilitate and accelerate processing by the business.

    Missions:
    Writing detailed functional specifications
    Database design
    Development of ASP.NET Web Forms applications
    ASP.NET .NET C# SQL Web Development Web Services

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Education

  • Master
    Supinfo
    2012

Certifications

  • Microsoft Certified Solution Developer
    Microsoft
    2018

Skill set

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