Freelancer profile translated to English.
Back to original languageAbout Arthur
Full-Stack Developer based in Rouen, specializing in React/Next.js (front) and .NET/Node.js (back) ecosystems. I design and develop modern web applications.
— My experience
Alongside my studies in Application Design and Development (CESI Rouen), I work in the IT department of Duhamel Logistique on real-world production business applications: complete migration of a B2B client portal (Vue 2 / .NET Framework to Next.js / .NET 8), major version upgrades (React 18→19, Next.js 14→16, MUI 5→7), refactoring of complex interfaces, optimization of Oracle SQL queries on large tables.
This production experience sets me apart:I understand the constraints of code that must function daily for real users, manage backward compatibility, and evolve over time.
— What I can do for you
- Development of pages, modules, or complete applications in React and Next.js (TypeScript, Tailwind, MUI)
- Backend in .NET 8 / C# or Node.js, API integration, database design
- Modernization of legacy codebases, major version upgrades
- Refactoring of complex interfaces (dashboards, client areas, internal tools)
- Technical audits and migration support
- Setup of self-hosted deployment infrastructures (Docker, GitLab CI/CD, Portainer, Traefik, GitOps)
- Audits and improvements of existing deployment pipelines
— My approach
Direct and factual communication, detailed quote before starting, regular progress updates, code delivered on a Git repository with documentation. Covered by Professional Liability insurance (certificate available upon request).
Portfolio: arthurreynet.dev
French
Native or bilingual
English
Fluent
Can work on-site
Rouen (up to 20km), Paris (up to 10km)
Experience
- Duhamel LogistiqueFull-Stack Developer — ApprenticeshipLOGISTICS AND SUPPLY CHAINJune 2024 - Today (2 years)Val-de-Reuil, FranceWithin the IT department, I contribute to the development and modernization of production business applications, as well as the complete setup of the deployment infrastructure.▸ FULL-STACK DEVELOPMENTParticipation in the complete migration of a client portal from a legacy stack (Vue 2 / .NET Framework) to a modern stack (Next.js 15 / .NET 8).Coordinated major version upgrades: React 18 → 19, Next.js 14 → 16, MUI 5 → 7.Development of complete modules: multi-criteria filterable tables, multi-step forms, API integrations, management interface refactoring.C# / .NET 8 Backend: scheduled tasks (Coravel), resolution of ASP.NET Core dependency injection issues, HTTP caching patterns. Optimization of SQL queries on large Oracle tables. Migration of the i18n architecture (next-intl).▸ INFRASTRUCTURE & DEVOPSComplete and autonomous setup of the self-hosted deployment infrastructure for business applications (client portal + e-commerce platform).— CI/CD: Self-hosted GitLab CI with installation and administration of runners on Ubuntu servers. Build pipelines, automated tests (Vitest), dependency vulnerability scans (Trivy).— Containerization and orchestration: Docker for all services. Portainer (Community Edition) to manage deployments on multiple Edge Agents — currently 4 environments (prod and staging × 2 projects).— GitOps Pattern: dedicated deployment repo, automatic updates of Docker image tags by the CI pipeline, automatic pull and redeployment by Portainer on each tag change.— Reverse Proxy: Traefik with automatic SSL configuration.— Registry: Integrated GitLab Docker Registry.Stack: React, Next.js, TypeScript, MUI, Tailwind CSS, .NET 8, C#, Oracle, Docker, GitLab CI, Portainer, Traefik, Trivy, Vitest
- klaq.ioFull Stack Developer — InternshipSOFTWARE PUBLISHINGMarch 2024 - May 2024 (2 months)Rouen, France2-month internship at the young startup klaq.io, publisher of a CRM SaaS for event service providers. The platform combines client management, quotes, invoices, event roadmaps, and operational calendars into a single tool.Mission: Full-stack development of complete features, from design to production delivery.Main achievements:- Implementation of an event roadmap module: PDF generation with detailed event information, integration of a Leaflet map calculating the route between the provider's office and the intervention sites, display of contextual practical information- End-to-end front and back development (React UI, NestJS endpoints, PostgreSQL modeling and queries)- Integration of B2B business modules into the SaaS commercial workflowsStack: React, TypeScript, NestJS, Node.js, PostgreSQL, LeafletContributions: first experience in a startup environment with a B2B SaaS product, autonomy in delivering complete features (from UI component to SQL query), exposure to documentation generation and geolocation issues on the product side.
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Education
- Bachelor — Application Designer DeveloperCESI Rouen2026Applications métier en production. Du front à l'infra : refontes de stacks legacy, montées de version majeures, modernisation d'outils internes. Mise en place d'infrastructure containérisé.
- Associate's Degree — Computer DeveloperCESI Rouen2025Fondamentaux du développement, premiers projets web et logiciel, premières expériences en équipe.