Freelancer profile translated to English.
Back to original languageAbout John
🔧 Senior Symfony & PHP Developer — Expert in migrations, architecture, and custom applications
Looking for a developer who can quickly understand your challenges, provide concrete solutions, and deliver clean, stable, and sustainable code?
I am John Quairia, a PHP/Symfony developer with over 8 years of experience, specializing in:
🚀 What I do best
Creation of custom applications (SaaS, business platforms, internal tools)
Complex migrations:
PHP “from scratch” → Symfony
Prestashop → Symfony
Old Symfony versions → Symfony 5/6/7
API integration, process automation, and inter-service communication
Robust architecture: clean separation, performance, security, scalability
Front-end development with Vue.js / Bootstrap / Symfony UX
Implementation of SSO, advanced user management, business workflows
🧰 Technologies mastered
Symfony (3 to 7) · PHP 7/8 · MySQL/MariaDB · RabbitMQ · ElasticSearch · Vue.js · Bootstrap · Strapi · WordPress
Experience with complex environments (SaaS, microservices, CI/CD pipelines…).
đź“Ś What I love to build
Platforms that replace paper processes and digitize business value
Tools that save time and simplify team life
Clean, well-thought-out, scalable applications — not patchwork
Ambitious technical migrations, where rigor and vision are needed
🎯 My professional goal
To bring real technical impact to every mission: unblock projects, stabilize shaky existing systems, support quality improvements, or develop a solid platform from A to Z.
🤝 Why work with me?
Because I don't just execute — I analyze, advise, and build with you.
I am accustomed to demanding environments, realistic deadlines, and projects that require a true business understanding.
French
Native or bilingual
English
Fluent
Can work on-site
Bruxelles (up to 50km)
Experience
- KazidomiSymfony DeveloperJune 2022 - April 2024 (1 year and 10 months)Bruxelles, BelgiumMigration from Prestashop to Symfony. Adding Strapi as a content manager. Providing features like stock management calculation based initially on an Excel file, data export, payment integration. I also provide some bug fixes and perform testing.
- BoxifySenior Software EngineerJanuary 2022 - June 2022 (5 months)Bruxelles, BelgiumFor this company, I provide maintenance of the old application made with Laravel 5, Vue.js which has been migrated to the latest version. I also work on the deployment of the new mobile application with React Native. For that, I developed a proxy API to manage all calls from the mobile app.
- Tiao.Freelance Senior Symfony DeveloperJune 2021 - January 2022 (7 months)Development and implementation of several micro-applications using an SSO system under Symfony 5. This includes designing modular architectures, integrating a centralized identity provider, fine-grained management of roles and permissions, and creating secure authentication flows. I also ensured communication between services, performance optimization, and the implementation of good DevOps practices to guarantee a fluid and consistent user experience across the entire application ecosystem.
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Education
- Bachelor in Computer SciencePolytechnic Faculty of Mons2005Bachelor in computer science
- Graduate in Computer ScienceIsicht2009Graduate in computer science
Certifications
- Symfony 7 Certified Developer (Advanced)SensioLabsSensioLabs2024