A Junior PHP Developer focuses on implementing simple features, fixing bugs, and maintaining existing code under close supervision. Typical tasks include writing PHP scripts, handling form submissions, and performing CRUD operations with MySQL or PostgreSQL. Juniors also assist in integrating APIs, follow coding standards, and contribute to documentation. Familiarity with version control (Git), basic MVC frameworks (Laravel, Symfony, CodeIgniter), and debugging tools is built at this stage, with emphasis on learning best practices and clean coding.

A Semi-Senior PHP Developer works independently on modules and mid-size projects. They develop APIs, optimize database queries, and ensure security through input validation and authentication methods. Responsibilities also include working with frameworks like Laravel or Symfony, implementing caching solutions (Redis, Memcached), and collaborating with front-end teams for seamless integration. At this level, developers begin contributing to CI/CD pipelines, containerization with Docker, and automated testing. They may also review code from juniors and suggest improvements.

A Senior PHP Developer leads back-end architecture and ensures performance, scalability, and security across projects. They design application structures, manage complex integrations with third-party services, and implement advanced caching and load balancing strategies. Senior responsibilities include mentoring junior and semi-senior developers, enforcing best practices, and conducting performance audits. They evaluate emerging technologies, contribute to architectural decisions, and ensure compliance with security standards such as OWASP. Strong expertise in DevOps collaboration, cloud deployments, and advanced PHP features defines this level.

Driving both technical and strategic direction, the PHP Development Manager oversees teams of developers and ensures projects align with organizational goals. Responsibilities include setting coding standards, defining architecture roadmaps, and managing vendor or tool selection. Managers coordinate with product owners, allocate resources, and report progress to executives. They are also responsible for evaluating migration strategies from legacy PHP systems, introducing modern frameworks, and fostering innovation in development practices. By combining leadership with technical depth, they ensure PHP platforms remain reliable, scalable, and business-aligned.