[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 tools Skills • 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 Search Company 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