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Polla JoelPJ

Polla Joel

Backend Developer | React & Symfony | PHP

€350/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Polla

Hello and welcome to my profile! 👋

I am Polla Joël, a freelance developer based in Paris to help you create your web applications (React, PHP, Symfony, REST API), or improve your backend (PHPunit, API, unit testing)

🎯 My areas of expertise:

✔️ Fullstack React + Symfony Development
With React.js, Symfony, PHP, TypeScript, API

✔️ Backend Architecture & REST API
With Symfony, Doctrine ORM, PostgreSQL, MySQL, JWT, OAuth2

🛠️ My technical stack:

Frontend → ReactJS, TypeScript, JavaScript, HTML5, CSS3
Backend → Symfony, PHP, API , Doctrine ORM, Node.js
Database → PostgreSQL, MySQL, SQL, MONGODB, REDIS
Auth & Security → SSO, Keycloak, JWT, OAuth2
DevOps → Docker, CI/CD, Github Actions, Git, Jenkins, Kubernetes
  • French

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • E-mopro
    Backend Developer | Fullstack | React.JS
    CIVIL ENGINEERING
    September 2025 - January 2026 (4 months)
    Paris, France
    Realization of a real estate management web application:

    ✔️ UI Redesign
    → Connecting React.js frontend to Symfony REST APIs for dynamic display. React.js components with React Query for cache management and Symfony API calls. UX optimization with TypeScript, HTML5, CSS3. React.js / Symfony / PHP stack for backend and frontend development.

    ✔️ Authentication Migration
    → Replacing the auth system with Keycloak via OAuth2, OpenID Connect, and SSO. IAM architecture integrated on the PHP / Symfony and React.js / React Query frontend side. Secured endpoints exposed by the Symfony PHP backend.

    ✔️ API Gateway
    → Symfony (PHP) module to centralize backend calls in a Microservices architecture. REST API PHP Symfony layer consumed by React.js and React Query. PHP / Symfony backend development with PHPUnit, MySQL, PostgreSQL. React Query for real-time synchronization between React.js and Symfony APIs.

    ✔️ CI/CD Pipeline
    → Automation of tests and deployments via Github Actions, Jenkins, Docker on the PHP / Symfony / React.js stack. CI/CD pipelines with Kubernetes and Docker. PHPUnit tests, Symfony backend development, Jenkins / Github Actions deployment. Skills: React Query, PHP, Symfony, React.js, backend development, Node.js, Git, Docker, SQL, microservices.
    Symfony React.js ReactQuery PHP Backend Development
  • Btpconnects
    Fullstack Developer
    CIVIL ENGINEERING
    January 2025 - September 2025 (8 months)
    Paris, France
    → Mission Objective: Design and develop an e-commerce platform for selling construction materials, enabling construction professionals to quickly find products and order online simply and securely.

    → Achievements:
    Development of a secure API with Symfony and API Platform to ensure reliable and fast processing of customer and order data.

    Creation of a modern interface with Next.js to provide smooth navigation and a better shopping experience.

    Implementation of a high-performance search engine with Meilisearch to allow users to quickly find the desired materials.

    Deployment of the platform on a VPS server with Nginx and HTTPS, ensuring service security and availability.

    Containerization with Docker to ensure a stable environment and facilitate application maintenance.

    Automation of deployments with GitHub Actions, enabling fast and reliable updates for users.

    Implementation of Telegram notifications to improve the monitoring and management of platform events.

    Optimization of performance and SEO to improve site visibility and speed for users.
    PHP Symfony React.js Next.js React Query
  • Nexton Consulting
    Frontend Web Developer React.JS
    DIGITAL AND IT
    August 2024 - January 2025 (5 months)
    Paris, France
    → Mission Objective: Golilla, a subsidiary of the ADEO group (Leroy Merlin, Tecnomat, Bricocenter), develops logistics solutions for managing and installing bulky products. I contributed to the improvement of their business application used by operational teams.

    → Achievements:
    Development and improvement of user interfaces in React and TypeScript to facilitate the use of the application by business teams.

    Optimization of component performance (lazy loading, API call optimization) reducing response times by 20%.

    Integration of REST APIs and global state management with Zustand and React Query to ensure reliable and fast data management.

    Implementation of unit tests (90% coverage) to improve product stability and quality.

    Creation of a design system of reusable components, increasing team productivity by 30%.

    Corrective and evolutionary maintenance of the application to continuously improve user experience.
    Web Development Backend Development PHP Symfony Developer React.js Next.js

Recommendations

MP
CB
FU
+2
Marc Polla and 4 other people have recommended Polla

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Education

  • Master in Web Development
    PARIS YNOV CAMPUS
    2022
    Mastère développement Web
  • Computer Science Bachelor's Degree
    UNIVERSITY OF YAOUNDE 1
    2013
    Licence Informatique

Skill set

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