Remote PHP Engineer – AI Code Review Contractor

About the role

As a PHP Engineer you will work remotely on an hourly‑paid basis reviewing AI‑generated PHP code, backend designs, and technical explanations. You will also produce high‑quality reference implementations and step‑by‑step reasoning for complex engineering problems, ensuring correctness, clarity, security, performance and adherence to prompts.

Key responsibilities

• Develop AI training content: create detailed prompts across PHP/backend topics and write high‑quality reference answers to guide AI learning.
• Optimize AI performance: evaluate, rank and provide feedback on AI responses to improve correctness, security, readability and contextual fit.
• Ensure model integrity: test AI outputs for inaccuracies, unsafe practices and potential biases; validate reliability across real‑world use cases.

Required profile

• Bachelor’s degree or higher in Computer Science, Software Engineering or a related field (or equivalent professional experience).
• 4+ years of professional experience developing production backend systems in PHP.
• Expert‑level proficiency in modern PHP (7.4/8.x+), including OOP, strict typing, namespaces, Composer and common design patterns.
• Strong backend fundamentals: HTTP, REST, authentication/authorization, sessions, caching, queues and API design.
• Deep experience with databases such as MySQL or PostgreSQL, including schema design, indexing, query optimisation and transactions.
• Experience with at least one major PHP framework (e.g., Laravel, Symfony) and knowledge of dependency injection, middleware and ORM trade‑offs.
• Security mindset with hands‑on knowledge of OWASP Top 10, input validation, SQL‑injection, XSS, CSRF and secrets handling.
• Comfort with version control, CI/CD workflows and automated testing (e.g., PHPUnit, integration tests, mocking).
• Prior experience with AI data training, annotation or evaluating AI‑generated technical content is a strong plus.
• Minimum C1 English proficiency (written and spoken) and ability to write clear technical explanations.

Required skills

• PHP (7.4/8.x+)
• Object‑Oriented Programming (OOP)
• Strict typing
• Namespaces
• Composer
• Design patterns
• HTTP & REST
• Authentication & Authorization
• Sessions, Caching, Queues
• API design
• MySQL & PostgreSQL
• Schema design, Indexing, Query optimisation, Transactions
• Laravel & Symfony
• Dependency injection, Middleware, ORM
• OWASP Top 10, Input validation, SQL‑injection mitigation, XSS prevention, CSRF protection, Secrets handling
• Git (version control)
• CI/CD workflows
• PHPUnit, Integration testing, Mocking