[Remote] Full-Stack / Backend Engineer (PHP, Automation, API Integrations) (Remote)

Note:The job is a remote job and is open to candidates in USA. ProTalent Recruiters is seeking a skilled Full-Stack / Backend Engineer to support the development and scaling of an internal platform for managing a large domain portfolio and automated content operations. The role focuses on platform architecture, backend stability, performance optimization, and implementation of new modules. Responsibilities• Maintain and develop a modular platform (component-based, API-first)• Design and implement REST APIs: authentication, error handling, data structures, JSON contracts• Work with complex business logic: domains, sites, indexing, internal processes• Optimize performance: caching, refactoring, profiling, load-handling improvements• Integrate external APIs: hosting panels (HestiaCP/VestaCP or equivalents), Cloudflare API (DNS/CDN/SSL), site management tools• Automate routine operations: cron jobs, bash scripts, WP-CLI flows, bulk actions across hundreds of domains/websites• Work with WordPress: plugin development/extension, automated content workflows, database structure management• Monitor logs, profile queries, detect bottlenecks, and resolve system issues• Implement backup and recovery mechanisms (logic, content, configuration level)• Design, update, and migrate database schemas• Build and optimize complex SQL queries with indexing and performance tuning• Process, transform, and manage large datasets within internal toolsSkills• 3+ years of experience in PHP• Strong experience with PHP 8.1+ (preferably 8.3): OOP, strict typing, exceptions, traits, namespaces, PSR-4/12• Advanced MySQL 8.x skills: JOINs, aggregations, subqueries, index optimization, transactions (ACID), migrations• Solid understanding of RESTful API design, validation, error handling, authN/authZ• Strong JavaScript (ES6+) knowledge: async/await, Fetch API, modular architecture• Solid HTML5/CSS3: semantics, responsive layout, Flexbox/Grid, CSS variables• Practical experience with hosting panels: HestiaCP / VestaCP or similar• Experience with multi-domain / multi-website platforms• WordPress: administration, automation, DB structure, WP-CLI — strong advantage• Cloudflare API or other DNS/CDN providers• Semantic search (embeddings + vector DB)• RAG pipelines for internal data• Automated SEO tools, content/config generation• Experience with LLM integrations: OpenAI / Anthropic / Gemini API• Node.js or Python for wrappers and tooling• Vector databases: PostgreSQL + pgvector, Qdrant, Milvus, Redis SearchCompany Overview• ProTalent Recruiters is a dynamic and proactive recruiting agency based in Europe, dedicated to connecting talents and empowering futures.It was founded in undefined, and is headquartered in Valencia, ES, with a workforce of 2-10 employees. Its website is Apply tot his job