Job Description To support the ongoing optimization of a web-based operational platform, we are looking for a Front-End Web Expert. The ideal candidate will bring deep expertise in improving code quality, enhancing front-end performance, and introducing modern development practices – particularly in real-time systems (e.g., Mercure), REST API architecture, and automated testing frameworks. Mentor and support a team of web developers Optimize front-end (React/TypeScript) and back-end (PHP/Symfony/API Platform) performance Improve resource efficiency (memory, CPU usage, initial load times) Define and implement front-end coding standards (naming conventions, error handling, etc.) Refactor and modernize the React/TypeScript codebase according to best practices Gradually replace legacy code (e.g., Bootstrap, outdated JavaScript, older React versions) Establish a structured, scalable front-end development framework (conventions, modular organization, quality benchmarks) Strengthen API structure and security using API Platform Provide ad-hoc technical leadership (code reviews, testing practices) Stay up to date with front-end technologies and continuously propose improvements Qualifications TECH STACK Back-end : PHP 8, Symfony 6 (LTS), API Platform, Mercure, MariaDB, Istio, ELK, Azure, Node.js Front-end : TypeScript, React (with MUI) Queueing : RabbitMQ Testing : Playwright (E2E), PHPUnit, JEST Databases : MariaDB Caching : Redis CI/CD : Azure DevOps, Docker, Git, Kubernetes Monitoring : APM (Kibana), Grafana, PMM, RUM (Kibana), Loki, OpenTelemetry In Progress : Migration to React / TypeScript / API Platform