Freelancer profile translated to English.
Back to original languageAbout Julien
Senior Fullstack Developer with over 15 years of experience, I support companies in the design, evolution, and performance of their web applications.
Specializing in PHP (Symfony / Laravel) and Javascript (Vue / React / Typescript), I work on projects from scratch, complex redesigns, and high-stakes maintenance.
I've had the opportunity to collaborate with major players like La Poste, Carrefour, La Croix, as well as numerous startups and agencies, on various topics:
development of marketplaces and SaaS
redesign of customer areas and acquisition funnels
creation of robust and scalable APIs
performance optimization and technical migrations
implementation of design systems and best practices (testing, CI/CD, accessibility)
💡 What I bring:
A product vision (not just technical)
Robust, maintainable, and tested code
Ability to integrate quickly into a team (Agile, code review, mentoring)
A constant focus on business value and user experience
🚀 Comfortable in complex environments (microservices, micro-frontends, cloud), I can provide support to a team or act as a technical lead on critical subjects.
🛠️ Technical Skills
Backend
PHP 8 — Symfony (3 to 7), Laravel
REST API / microservices design
DDD architecture, best practices (SOLID, clean code)
Frontend
Javascript / Typescript
Vue.js (Nuxt, Vuex), React (Next.js)
UI integration, design systems (Storybook)
Accessibility (RGAA)
Data & Storage
MySQL, PostgreSQL
Elasticsearch, MongoDB
Firebase
Testing & Quality
PHPUnit, Behat
Jest, Vitest
CI/CD, code review, continuous improvement
DevOps & Deployment
Docker, Nginx
AWS
Tools: Ploi, Forge, DeployerPHP
Tools & Integrations
Stripe, Mapbox, Algolia, Cloudinary
Authentication: OAuth2, Firebase, Supabase
Emailing: Mailchimp, Sendinblue
English
Conversational
French
Native or bilingual
Can work on-site
Paris (up to 15km)
Experience
- HomelandPHP Symfony React DeveloperREAL ESTATESeptember 2025 - April 2026 (7 months)Paris, FranceWithin a team of 4 developers and 1 lead dev, I participated in the continuous improvement of the HBO software, the extranet for co-owners, as well as the migration of our property management data (following the merger between Homeland and Immocity).Key tasks performed:Migration to Symfony 7.4 and PHP 8.5Implementation of electronic invoicing for Belgian clientsImplementation of LRE with Stampee/AR24Increase in PHPStan level (from 3 to 5)Generation of energy performance certificates in SVG (new version)Integration of automatic reminder features with BJASynchronization of data between the Vilogi accounting software and HBOI also participated in code review of PRs and QA of features in the absence of a dedicated QA.Technical environment:Gitlab, Kubernetes, Mysql, PHP 8.5, Symfony 7.4, React, Stimulus, Graylog, ClaudeCode
- SPYRITPHP Symfony Vue DeveloperDIGITAL AND ITJanuary 2025 - July 2025 (6 months)Paris, FranceAt a Versailles-based web agency, I develop and maintain PHP 8.4 and Symfony 7.2 applications.Projects I've worked on:ExalideMaintenance and feature development on intranets for dioceses in the Île-de-France region.VenioMaintenance and feature development on the SaaS platform that allows clients to create and manage events.Replacement of Lemonway with WorldlineLeLegalisteMaintenance and feature development on the website for publishing legal notices.SUFFeature development on the ERP for the Scouts Unitaires de France.Use of Symfony UX with Twig components, Live components.Migration of existing data to a new schema.OthersMigration of several PHP 7.4 + Symfony 4.4 projects to PHP 8.4 and Symfony 6.4Maintenance of a Vue application
- CaatsPHP Laravel Vue Nuxt DeveloperE-COMMERCEMarch 2024 - September 2024 (6 months)Paris, FranceDevelopment and maintenance of new features on the websiteLoyalty programReferral programCheckout pageMenu page (funnel side)Redesign of the customer area:Integration of new Figma mockupsImplementation of a design system with StorybookImplementation of Vue for different pagesRedesign of the acquisition funnel:Implementation of NuxtIntegration of the new mockupErgonomics improvement
Reviews
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Education
- Professional Degree in Internet DesignIUT Nancy Charlemagne2009
Certifications
- SymfonySensiolabs2015
- Digital AccessibilityAccess42