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Sansaone

Senior PHP Developer

Sansaone
Belgium · Full-time · Mid-Senior

Position Title: Expert Web Front End (Front End Symfony/Typescript/Temps Réel)

Location: Brussels, Belgium

Duration: 6 Months

Languages: Dutch or French and English

Work mode: Hybrid


Job Description:

As part of the continuous optimization of our web platform, we are looking for a Front End Web Expert who can support us in improving code quality, front-end performance (suggestion for back), and implement best practices around modern technologies, including real-time (Mercury), REST APIs and automated testing.


MAIN MISSION

• Support for a team of developers

• Optimisation des performances du front-end (React / Typescript) et du back-end (PHP / Symfony / API Platform)

• Optimization of resources used in real time (memory, cpu, first load),

• Implementation of front-end quality standards (bill of materials, error management, etc.)

• Redesign of the React/Typescript code architecture and structure, in alignment with modern development best practices

• Progressive replacement of legacy code (Bootstrap, JavaScript, old React database)

• Implementation of a true Front-End framework: project conventions, quality standards, modular and scalable code organization

• Structuring and securing APIs with API Platform

• Occasional technical supervision of developers (code reviews, testing, etc.)

• Technology watch and proposal of continuous improvements on the stack


TECHNICAL ENVIRONMENT

• Back-end : PHP 8+, Symfony 6 (LTS), API Platform, Mercure, MariaDB, Istio, ELK, Azure, NodeJS

• Front-end : Typescript, Framework JS (React/mui)

• Queuing : Rabbitmq

• Testing : Playwright (E2E), PHPUnit, JEST

• Database: MariaDB

• Cache : Redis

• CI/CD: azure devops / Docker / Git/ K8s versioning

• Monitoring : APM Kibana, Grafana, PMM, RUM Kibana, Loki, opentelemetry

• Migration en cours : React / Typescript / API Platform


DESIRED PROFILE

• Proven experience as a web integrator

• Proven experience (10 years+) in front-end web development, with React / Symfony / API Platform / Real-Time expertise

• Very good control of real time and the related scalability issues

• Advanced knowledge of the modern front in Typescript

• Engineering spirit, rigor, sense of optimization

• Ease with software architecture and application performance

• Good communication skills and technical writing

• Ease in source code management (git, ticketing, etc.)


BONUS APPRECIES

• DevOps experience (Docker, CI/CD)

• Front and back application monitoring

• Knowledge of web security (Auth/JWT)

• Performance / validation tools

Key Skills

Ranked by relevance

react typescript symfony docker devops git php javascript bootstrap mariadb grafana istio loki cicd elk
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Posted
Jul 14, 2025
Type
Full-time
Level
Mid-Senior
Location
Brussels Region
Company
Sansaone

Industries

IT Services IT Consulting

Categories

Information Technology

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