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Guillaume N.GN

Guillaume N.

Experienced .NET C# Developer

€550/day
Poitiers, FR
8-15 years

Average response time: 1 hour

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About Guillaume

With 8 years of experience in software engineering, I am involved in the entire technical value chain: from the maintenance of complex legacy application portfolios to the design of modern architectures in full remote.
My dual expertise:

1. Modernization & Maintenance of Existing Systems (Legacy):

- Stabilization and evolution: Incident management and bug fixing development on large-scale application portfolios (e.g., La Poste, Smacl Assurances).
- Technological mastery: Involvement in various environments including PHP (5/7), legacy C# .NET, and Oracle or SQL Server databases.
- Documentation: Writing detailed technical specifications to ensure the longevity of your business tools.

2. Development of Modern Solutions (SaaS & ERP)

- Backend .NET Core & Python: Designing robust APIs and scalable architectures with .NET Core and Django REST Framework.
- Frontend Vue.js: Creating fluid and responsive user interfaces (Dashboards, ERP).

Why choose me?

Product Vision: As the founder of the SaaS Easy-KPIs, I understand your business and ROI challenges.
Autonomy & DevOps: I manage the entire lifecycle of your applications, from deployment to the administration of your Linux/Docker servers.
"Key Account" Rigor: Solid experience acquired within demanding organizations (Econocom, ACII).

Terms: 100% Remote (Based in Poitiers) Possibility to come in once a week depending on the geographic area.

Immediately available for long-term assignments or targeted technical interventions.
  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • EASY-KPIS
    DEVELOPMENT OF A SALES DATA ANALYSIS SOFTWARE
    June 2025 - Today (1 year)
    • Development and commercialization of a sales data analysis software. Technologies used: Django Rest Framework (Python), VueJS, and pgSQL.
    Django Python database management Vue.js Node.js
  • JARDINDECO.COM
    DESIGNER-DEVELOPER
    September 2020 - June 2025 (4 years and 9 months)
    86000 Poitiers, France
    • Development and maintenance of the ERP (.NETCore) and the e-commerce site (PHP), server administration, database administration, and management of development projects.
    C# .NET SQL database management backend service development
  • ACII (CDI)
    DESIGNER-DEVELOPER
    April 2019 - September 2020 (1 year and 5 months)
    79000 Niort, France
    • Application management on an intranet, extranet, and internet platform for Smacl Assurances. Development (project and maintenance modes), consulting, and validation missions.
    PHP Java

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Education

  • MASTER BIO-INFORMATICS AND BIO-STATISTICS
    UNIVERSITY OF NANTES
    2018
    MASTER BIO-INFORMATIQUE ET BIO-STATISTIQUE
  • BACHELOR'S DEGREE IN LIFE SCIENCES
    UNIVERSITY OF LA ROCHELLE
    2016
    LICENCE 3 SCIENCES DU VIVANT

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