Job DescriptionTo 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 developersOptimize front-end (React/TypeScript) and back-end (PHP/Symfony/API Platform) performanceImprove 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 practicesGradually 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 PlatformProvide ad-hoc technical leadership (code reviews, testing practices)Stay up to date with front-end technologies and continuously propose improvementsQualificationsTECH STACKBack-end: PHP 8+, Symfony 6 (LTS), API Platform, Mercure, MariaDB, Istio, ELK, Azure, Node.jsFront-end: TypeScript, React (with MUI)Queueing: RabbitMQTesting: Playwright (E2E), PHPUnit, JESTDatabases: MariaDBCaching: RedisCI/CD: Azure DevOps, Docker, Git, KubernetesMonitoring: APM (Kibana), Grafana, PMM, RUM (Kibana), Loki, OpenTelemetryIn Progress: Migration to React / TypeScript / API Platform