Senior PHP Backend Developer (Symfony)

InTTrust is a trusted Technology and Digital Solutions provider creating value for customers, encompassing IT Consulting and Implementation services, Database Operation, Administration and Optimization services, IT Managed Services, Cloud Governance & Security services. We are experts on Digital Transformation Solutions, Custom Applications Development & Application Modernization, IoT and ML/AI solutions, Design and Implementation of Private/Public/Hybrid Cloud solutions together with Multi-Cloud Integration. We are seeking to hire a Senior PHP Backend Developer with strong Symfony expertise to join a team that works directly on-site at our key customer's premises within the dynamic and critical energy sector. You'll be responsible for developing and delivering robust, high-quality backend services, coordinating with frontend and other technical teams to ensure our customer's core systems are performant and reliable. What will you do • Design, develop, and maintain high-quality backend services and APIs using Symfony. • Write clean, well-documented, and efficient code. • Build and integrate asynchronous message handling and webhook-based workflows. • Collaborate with cross-functional teams to define, design, and ship new features. • Participate in all phases of the development lifecycle. • Ensure the performance, quality, and responsiveness of applications. • Excellent knowledge of PHP 8.2+, with significant experience in Symfony (5.x / 6.x). Having implemented at least two production projects with Symfony. • Proven experience with Doctrine ORM 2 — entities, repositories, DQL, associations, and migrations. • Hands-on experience with Symfony Messenger for asynchronous message handling. • Experience designing and implementing webhook handling. • Proven experience with MySQL — schema design, migrations, indexing, and basic query optimization. • Strong understanding of Object-Oriented Programming (OOP) principles and common design patterns. • Experience in designing and consuming RESTful APIs. • Testing discipline with PHPUnit or Pest (Feature + Unit tests). • Proficiency with Git and conventional commits. • Familiarity with CI/CD pipelines. • Working knowledge of Docker. • Bachelor's degree in Computer Science, Information Systems, Engineering, or related field. • A minimum of 4 years of experience developing and maintaining backend services with PHP. Nice to have • Experience with cloud services (GCP preferred; AWS or Azure also welcome). • Static analysis tooling (PHPStan level 5+) and code style tooling (Pint, Rector). • Experience integrating with payment providers (e.g., Stripe). • Experience integrating with enterprise systems such as SAP S/4HANA or Salesforce. • Familiarity with OAuth2 / SSO across multiple providers (Apple, Google, Microsoft, Facebook). • Familiarity with modern JavaScript frameworks such as Vue.js, React, or Angular. The offered salary package is competitive and will be based on the candidate's experience. Candidates should have: • Eligibility to work within the EU. • Fluency in Greek. InTTrust S.A. is proud to be an equal opportunities workplace and is an affirmative action employer. We are committed to equal employment opportunity regardless of age, race, colour, national origin, gender, sexual orientation, religion, disability or genetic information, or any other protected classification. We are committed to ensuring that our applicants and employees are respected, treated fairly and with dignity.