Senior Backend Engineer (PHP / Symfony) - Room Estate team

We are looking for a Senior Backend (PHP) Engineer to join one of our long-term partners, Room Estate. The role is focused on developing a modern Symfony backend service that will work alongside an existing Drupal-based system, with a strong long-term focus on scalable architecture and gradual system modernization. You will work closely with the mobile developer and have strong ownership over backend architecture, API design, and technical decisions. What You’ll Do Design and develop REST APIs using PHP 8+ and Symfony Build scalable backend services integrated with existing Drupal and MySQL systems Work on cloud-native and modular architecture solutions Design database structures, optimize queries, and improve system performance Collaborate with the Flutter developer on API contracts and integrations Contribute to architectural decisions and long-term system evolution Write clean, maintainable, and well-tested code Participate in code reviews and technical improvements Requirements Strong experience with PHP and Symfony in production environments Experience building REST APIs and backend services from scratch Excellent understanding of MySQL and database design Experience with testing (PHPUnit, integration/unit testing) Solid understanding of software architecture and clean code principles Experience with Git workflows and code reviews Ability to work independently and take ownership Nice to Have Drupal experience AWS knowledge Docker / DDEV experience Experience with shared-database or microservice architectures Experience building mobile-focused APIs What We Value Ownership and proactive mindset Strong communication and transparency Pragmatic problem solving Willingness to suggest improvements and drive technical decisions Ability to work independently in a fast-moving environment Why you'll love working here: Private health insurance Flexible work model – hybrid or remote Equipment of your choice (laptop, monitor, accessories) High-growth company with innovative products Supportive, international team Budget for professional development (courses, books, conferences) English and German language lessons during working hours Nice office in Belgrade with a stocked kitchen and game area Opportunity to learn, grow, and make a real impact If you are looking for an environment where you can grow professionally, learn from the best in the field, balance work and life habits and have a pleasant and enthusiastic environment, please submit your CV in English.