Freelancer profile translated to English.
Back to original languageAbout Stéphanie
Specializing in the overhaul of critical PHP/Symfony applications, I work on complex projects where technical debt, flawed architecture, or outdated data structures hinder growth.
My specialty: taking over an existing system, understanding its business constraints, and transforming it module by module without service interruption.
What I've done concretely:
- Complete overhaul of an e-commerce site (Symfony 4 => 6), architecture + database, secure data migration
- Overhaul of two critical APHP applications in production: MICI medical tool + hospital bed management (PHP 4 => 8, MySQL reconstruction, zero downtime)
My preferred sectors: Digital Health | E-commerce | Finance | Legacy Systems
Paris — Mostly remote
Available for long-term missions (3-12 months) or one-off audits
French
Native or bilingual
Vietnamese
Conversational
English
Conversational
Can work on-site
Paris (up to 30km)
Experience
- LEG GSMSymfony DeveloperE-COMMERCEMarch 2021 - March 2023 (2 years)Ivry-sur-Seine, FranceI was hired to completely overhaul the company's e-commerce site, migrating from Symfony 4 to Symfony 6.Architecture & Database:
- Project architecture overhaul
- Participation in the design of the new MySQL database
- Implementation of optimized entities and relationships
Back & Front-end Development:- Code migration to Symfony 6 + PHP 7
- Integration of custom features (catalog, cart management, etc.)
- Use of JavaScript for front-end interactivity
Data Migration:- Analysis and transfer of data from the old site to the new structure
- Secure migration scripts adapted to the new business logic
Methodology & Tools:- Use of Git for versioning
- Autonomy throughout the development cycle (analysis, development, testing)
- IKAFull-Stack Symfony/React DeveloperSOFTWARE PUBLISHINGMarch 2023 - March 2024 (1 year)Boulogne-Billancourt, FranceAs part of an agile team (Scrum) in a demanding financial environment, I work on a project structured in DDD (Domain Driven Design), with a modern stack and an advanced development process.Work Method:
- Agile/Scrum methodology, 2-week sprints
- Jira tickets: creation of new features, bug fixing, legacy code refactoring
Technical Environment:- Symfony 7 / PHP 8 / PostgreSQL
- DDD architecture, REST API, automated testing
- CI/CD for continuous integration and deployment
- React front-end
Active Contribution:- Development of complex business modules
- Adherence to clean code & SOLID best practices
- Collaboration with PO, QA, and back-end/front-end developers
- Assistance Publique-Hopitaux de ParisIT Design DeveloperHEALTH AND WELLNESSDecember 2024 - Today (1 year and 8 months)Paris, FranceIn an Agile environment, I work on two critical projects simultaneously: an IBD (Inflammatory Bowel Disease) research tool, and an internal hospital bed management application.Project 1: Overhaul of an IBD research toolArchitecture and Database
- Complete overhaul of several existing internal modules
- Reconstruction of the MySQL architecture to match new business logic
- Migration from PHP 4 to PHP 8, adapting the in-house framework to these changes
Work Method- Agile methodology, without a Product Owner: direct contact with users (researchers, doctors)
- Responsibility for needs analysis, development, and production deployment
- Continuous management of tickets based on business priorities
Technical Environment- PHP 4 → PHP 8, custom framework, MySQL
- Legacy code refactoring
- Debugging and development of complementary modules
Project 2: Hospital bed management applicationFeatures and Maintenance- Development of new features (additions, modifications, improvements)
- Corrective and evolutionary maintenance of an application used in real-time by hospitals
- Consideration of user feedback to prioritize developments
Work Method- Agile work with ticket management
- Autonomous organization of tasks and deliverables according to the hospital schedule
Technical Environment- PHP 4 → PHP 8, JavaScript, MySQL, internal APIs
- Progressive version upgrades with adaptation of existing code
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Education
- Junior Web DeveloperOpenClassroom2020Pédagogie par projet – 5 réalisations concrètes pendant ma formation : Web Agency – Intégration responsive d’une maquette d’agence web (HTML/CSS – design pixel perfect) Office du tourisme de Nouméa – Création d’un site WordPress personnalisé à partir d’un thème existant (CMS – personnalisation avancée) Lyon Vélo – Développement d’une carte interactive de stations vélo en JavaScript orienté objet (HTML, CSS, JS – POO) Blog Écrivain – Création d’un blog avec système de commentaires et structure MVC (PHP – POO, architecture MVC) Carnet de voyage (projet personnel) – Application web pour consigner des voyages et souvenirs (HTML, CSS, JS – POO ; PHP – MVC/POO)
- Bachelor in Information System Project DesignETNA (Advanced Digital Technologies School)2022Ma formation m’a permis d’explorer plusieurs univers du développement web et logiciel à travers une pédagogie active par projet. J’ai ainsi acquis des compétences solides en : Intégration & front-end : création d’interfaces web responsives en HTML, CSS et JavaScript orienté objet. Développement back-end : programmation en PHP avec architecture MVC (natif, Laravel, Symfony), et utilisation de Node.js pour créer des APIs. Gestion de base de données : conception et manipulation de bases de données MySQL/MariaDB avec requêtes complexes. Programmation système : bases en C++ et en administration de systèmes Windows et Unix. DevOps & conteneurisation : découverte de Docker pour l’environnement de développement. Développement mobile & API : création et consommation d’API REST ; premières expériences avec Android Studio.