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PHP Backend Developer (Middle–Senior) at MGID. Location Information: Ukraine. MGID is a global advertising platform that helps publishers monetize their audiences and enables brands to promote their products and services across the open web effectively. Using AI-powered technology, we deliver high-quality native, display, and video ads in brand-safe environments, balancing user experience and performance. Every month, MGID reaches over 1 billion unique users and delivers 185 billion ads in more than 70 languages. Trusted by brands like Renault, Domino’s, Nestle, and Ikea, we support every stage of the marketing funnel – from planning campaigns to optimizing performance. Founded in 2007, MGID has grown to operate from 18 offices worldwide, with a team of over 800 colleagues across North and South America, Europe, and Asia. Our ongoing investments in technology, talent, and strategic partnerships have fueled five consecutive years of double-digit growth. We continue to evolve and expand to meet the ever-changing needs of the digital advertising ecosystem.. As a . PHP Backend Developer. you will build and maintain the backend services and APIs that power MGID’s advertiser dashboards. Your work will sit at the very core of how advertisers create campaigns, track conversions, and optimize performance. You will collaborate closely with Product Owners, Frontend Developers, QA Engineers, and DevOps specialists while reporting to the Tech Lead. This is a role where your engineering decisions have a direct, visible impact on advertisers’ results and the business at large.. The position is . remote-friendly within EMEA time zones. , with required overlap to Kyiv working hours.. What You’ll Do. Develop and maintain backend services, microservices, and APIs. Integrate third-party services and internal libraries. Model relational schemas, write optimized queries, and tune database performance. Design, version, and document RESTful APIs (OpenAPI/Swagger). Write and maintain unit, integration, and module tests. Ensure high code quality via reviews, linters, and static analysis. Configure CI/CD pipelines and collaborate with DevOps on deployments. Implement authentication, authorization, and input validation best practices. Participate in architecture and scalability discussions, breaking down monoliths into services when appropriate. Share knowledge with teammates through documentation, walkthroughs, and mentorship. Who You Are. Must-Have. You have . 3+ years of professional PHP (7/8) development experience. .. You have strong skills in . Symfony. (or another MVC framework with readiness to transition).. You possess strong . SQL. expertise (MySQL or PostgreSQL).. You possess experience designing, implementing, and documenting . RESTful APIs. You apply . unit. and . integration. testing consistently to ensure code reliability and maintainability.. You are . fluent in Ukrainian. and have at least . intermediate English. You take initiative, work independently, and articulate your ideas with clarity.. You welcome feedback and approach problems with a structured, analytical mindset.. Nice-to-Have. You have experience with Kafka, Redis, or ClickHouse.. You have worked on performance optimization at scale.. You have exposure to CI/CD pipelines and DevOps collaboration.. You possess a Bachelor’s degree in Computer Science or related field.. At MGID, we thrive on innovation, collaboration, and a passion for AdTech. Our culture is built on openness, transparency, and a shared drive for excellence. Here, your ideas matter, your contributions are valued, and your potential has no limits. Join us and shape the future of digital advertising!