Freelancer profile translated to English.

Description

Is your .NET application in crisis?Recurring bugs, paralyzing technical debt, plummeting velocity…

I step in when teams spend more time firefighting than delivering value.

I stabilize, restructure, and make your system reliable, maintainable, and ready to evolve.

And because code is usually just thetip of the icebergwhen it comes to problems, I also help you upgrade your **development processes**.

🧭My profile in brief:

- Quality-oriented .NET Developer

- Extensive experience in taking over legacy projects with high technical debt

- Structured migrations to .NET 8 (from .NET Framework 4.8)

- Complete setup of CI/CD and multi-environment workflows

- Clean Architecture, DDD, CQRS, unit & integration tests

- Autonomous or integrated into an existing dev team

🪄Why my clients keep me:

- Because I don't just code:I bring the missing rigor and structure

- Because I am reliable, methodical, and always share my expertise.

-Because my deliverables are built to last,not to be redone.

⚙️Concrete examples of delivered value:

- Migration of legacy apps to a modern stack

- Complete CI/CD with multiple environments (DEV, QA, UAT, PRE-PROD)

- Test coverage from 0 to 80% without artificial bloat or regressions

- Development of new projects with a near-zero bug rate over several years

- Support for over 5 years with one client

🧢Some of my clients have nicknamed me "Indiana Jones"

I step in when the code threatens to collapse and no one dares to touch it anymore.

I grab the machete, blaze a trail, and bring legacy systems back as stable, structured, and ready-to-evolve systems.

📞 Available for a quick start. Contact me to discuss your project.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Lille (up to 50km), Paris (up to 50km), Toulouse (up to 50km), Bordeaux (up to 50km), Marseille (up to 50km)

Ircem
Full Stack C# .NET / REACT Developer
BANKING AND INSURANCE
August 2025 - Today (1 year)
Lille, France
Developments carried out on 2 platforms as well as the surrounding components, ensuring RUN and BUILD across multiple teams.
.NET React.js
ABILWAYS
Full Stack .NET Developer
EDUCATION AND E-LEARNING
January 2022 - April 2025 (3 years and 4 months)
Paris, France
Joined a team (IT Department, **6 senior developers**) for a near-complete overhaul of the company's application ecosystem (training center), mostly legacy, without CI/CD, and with production as the sole environment.

*Overhaul and modernization of legacy applicationsin .NET 4.8: clean code, refactoring, enhancements. Migration to .NET 8 for most of them.
**Development of new projects**: creation of a global mailing API for the company's solutions, meeting management API (Teams, Webex), integration of third-party APIs (Pipedrive, Edusign, ...). Test coverage nearing 80% in most cases.
*Ensuring evolutionary and corrective maintenance.

*Code Reviews of Pull Requests.
**Lead DevOps from Scratch**: CI/CD on a self-hosted GitLab via creation of generic templates (jobs, pipelines), significant reduction in test execution time, deployment (NuGet packages, IIS, ...), SonarQube, creation of 2 environments (DEV, UAT), database-related automations, ElasticSearch automation, Team Git Workflow revisited, ...

C# / .NET / Autofac / Serilog / JavaScript / Bootstrap / XUnit / NUnit / Moq / ElasticSearch / Redis / SQL Server / IIS / Azure Active Directory / Clean architecture / CQRS / DDD / Monolith & Microservices
.NET C# Clean Architecture CQRS DDD Software Craftsmanship
Meritis
.NET / .NET Core Developer
DIGITAL AND IT
March 2021 - December 2021 (9 months)
Paris, France
Development of an API in .NET 6 through collaboration with business stakeholders and the development team.
Implementation offull test coverageof 80% (unit tests and integration tests).
Adherence tobest development practices(Clean Code, SOLID, etc.).
*Migrationof the existing API from .NET Framework 4.8 to .NET 6.
Considerable reduction of **technical debt**.
Writing of the API'stechnical documentation(overall functionality, technical specifics not related to code, configuration on a new developer workstation, …).

C# / .NET / .NET Core / OAuth2.0 / Automapper / DI / Xunit / Moq / Git (GitFlow) / Microsoft SQL Server / Azure
C# .NET ASP.NET Core .NET C# ASP.NET Web API

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Master's Degree - Expert in Information Technology
EPITECH, Lille - Paris
2020
1 year of computer science studies in South Korea, at Chung Ang University, as part of my 4th year at EPITECH
Chung Ang University (South Korea, Seoul)
2019

Vianney Doleans

Expert .NET - Rescuing Critical & Legacy Projects

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