Senior PHP

Twenty8 is an independent firm delivering IT services to international organizations, with a focus on supporting digital transformation, business development, and customer-centric solutions. We collaborate closely with European Union public institutions and agencies, helping skilled professionals navigate and grow in their international careers. We are currently seeking a senior Senior PHP / Symfony Developer to design, develop and secure high-scalability backend applications while implementing DevSecOps best practices across the full software lifecycle for a prestigious European Institution in Brussels. 🇪🇺️ KEY RESPONSIBILITIES: Lead the migration and modernization of PHP/Symfony applications, integrating them with multiple CRMs and ensuring end-to-end development across backend, APIs (including API Platform) and cloud services; Design, develop and maintain secure, scalable cloud infrastructure with strong focus on reliability, security and performance optimisation; Implement and maintain DevSecOps practices, including platform security hardening, monitoring, compliance frameworks and proactive vulnerability management; Build and maintain database-driven systems and Symfony modules, refactoring legacy code, improving performance and developing new components, services and internal tools; Oversee system integrations, data pipelines and API connectivity (REST/JSON, API Platform), ensuring smooth communication between applications, devices and cloud-based architectures in high-scalability environments; (Optional when needed) Contribute to front-end development using React, ensuring modern, responsive and maintainable UI components. REQUIREMENTS: Strong expertise in PHP and Symfony, with ability to design, develop, integrate and maintain complex, scalable backend applications using Symfony Framework and API Platform; Solid knowledge of Web Security and DevSecOps practices, including secure coding, continuous integration, security monitoring, authentication/authorization (OAuth2, OpenID Connect) and data-protection principles; Proficiency in SQL/MySQL and relational database design; Hands-on experience with front-end basics (HTML, CSS, JavaScript) and familiarity with React is considered a strong asset; Familiarity with DevOps toolchains such as Git, Jenkins, Sonar, Nexus, JIRA/Confluence and cloud-based environments; University degree in Computer Science or relevant fields; Eligibility for Personal Security Clearance; Fluency in English (C1); Ability to work in multicultural and international settings. This is a hybrid role, requiring on-site presence at the Brussels office 3 days per week. Ready to Apply? If your skills and experience align with this role, we'd love to hear from you Submit your CV today and embark on an exciting journey with us