Freelancer profile translated to English.
Back to original languageAbout Steven
🚀 Want a web or mobile application that works, scales, and impresses your users? I'll build it for you.
Full-Stack Symfony / React Developer for over 5 years, I support startups, SMEs, and agencies inthe design, development, and optimization of high-performance and reliable applications.
I have worked on various projects:complex back-offices, internal platforms, custom business tools, e-commerce, public-facing websites, and high-performance APIs,for prestigious clients such asENGIE, Renault/Nissan, Havas Voyages, HP, and Crédit Agricole.
I am also **founder and developer of ptitexplorer.com**, a complete web and mobile platform that I designed and developed from A to Z (Next.js, React Native, Node.js, Docker, advanced SEO).
My key skills:
- Backend : Symfony, PHP, REST API / Node, scalable architecture
- Frontend : React, Next.js, React Native, UI/UX integration
- Infrastructure & DevOps : Docker, CI/CD, cloud deployment, performance optimization
- Maintenance & audit : refactoring, monitoring, bug fixing, SQL optimization
Autonomous, results-oriented, and with a strong product vision, I transform your business needs intorobust, scalable, and user-friendly solutions.
Available immediately – contact me to discuss your project – remote or in-person Rennes/Vannes
French
Native or bilingual
Can work on-site
Vannes (up to 50km), Rennes (up to 10km)
Experience
- Le p'tit explorerFounder & Full-Stack DeveloperENTERTAINMENT AND LEISUREOctober 2024 - Today (1 year and 8 months)Le Mans, FranceComplete creation of a web and mobile platform for listing "kids-friendly" places in France. Full product development: frontend, backend, mobile, back-office, infrastructure, and SEO.Main features:
- Website inNext.jswith advanced SEO for excellent Google ranking.
- Development of aNode.js APIto centralize data management.
- Creation of aNext.js back-officefor managing locations, moderation, media, and content.
Stack & infrastructure:- Next.js · React Native · Node.js · PostgreSQL
- Docker · Git · Hosting onScaleway
- Image management viaCloudinary
- Transactional notifications & emails viaBrevo (Sendinblue)
- Address data viadata.gouv.fr Address API
- Anonymized statistics withPlausible Analytics
- Interactive maps withLeaflet
Technical achievements:- Product design and developmentfrom A to Z.
- Backend architecture (REST API), permissions management, sorting, filtering, geolocation.
- Implementation of advanced technical SEO: dynamic sitemap, metadata, rich snippets.
- Containerized deployment via Docker + performance optimization.
- Complete back-office integration for catalog administration.
- Implementation of a cookie-less analytics pipeline (GDPR-friendly).
This experience allowed me to manage the entire development cycle: design, development, mobile, deployment, optimization, and monitoring. - Crédit Agricole d'Ile-de-FranceHead of Production Maintenance - Peri-InformaticsBANKING AND INSURANCEJanuary 2024 - October 2024 (9 months)Paris, FranceIntervention in a banking environment on the maintenance of over 300 internal applications.Responsible for maintenance, debugging, and incident resolution in production on a critical, high-volume system.Stack & tools:
- PHP / Zend Framework, internal scripts
- SQL Server, optimization and correction of stored procedures
- Jira (ticket management, prioritization, SLA)
- Grafana (application and server monitoring)
- Internal scheduler, batch & job supervision
Technical missions:- Incident analysis (performance, application errors, timeouts, SQL errors).
- Debugging and fixes on PHP applications (legacy Zend).
- Verification and optimization of SQL queries, refactoring of stored procedures.
- Monitoring Grafana dashboards: availability, custom alerts.
- Control of the scheduler, restart and supervision of scheduled jobs.
- Stabilization and security of critical services.
- Documentation of recurring incidents + improvement of support processes.
This mission allowed me to deepen my skills in application diagnostics, advanced incident management, legacy code debugging, and real-time monitoring of a high-stakes multi-application environment. - DijiFull Stack PHP/Symfony Developer - C#/.NETCONSULTING AND AUDITSJune 2022 - June 2023 (1 year and 1 month)Levallois-Perret, FranceDevelopment and improvement of business applications for several major clients, in various environments focused on performance, reliability, and scalability.Main missions:
- ENGIE – Development of new business modules
Stack: Symfony, MariaDB, Git- Design of new features for an internal tool.- Implementation of backend best practices and query optimization.- Strengthening of the existing structure to support new business flows.- RENAULT / NISSAN – Complete overhaul of the DIAC back-office
Stack: Symfony, REST API, SOAP API- Complete takeover of the back-office for a mobile application used by the DIAC network.- Creation of REST APIs and integration of SOAP services.- Technical migration, code rationalization, and performance improvement.- Ivory Coast – License Plate Management Application
Stack: Symfony, RabbitMQ, PostgreSQL- Development of a complete business application for stock management.- Implementation of a queue system with RabbitMQ to ensure reliable processing.- Robust backend architecture to support a high volume of operations.- HAVAS VOYAGES – Advertising Improvement Modules
Stack: C#, .NET- Development of internal tools to optimize ad insertion in emails.- Design of management and control interfaces.- Integration into the internal pipeline and automation of recurring tasks.Skills used: Symfony (5->7), PHP 7/8, REST API, SOAP, RabbitMQ, PostgreSQL, MariaDB, Git, C#, .NET, backend architecture, custom module design.This experience allowed me to design custom solutions and optimize complex backend architectures.
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Education
- BAC +2, Développeur webHITEMABAC +2, Développeur web
- Bachelor's Degree in ManagementUniversité Paris Dauphine2014Licence Gestion