Senior Backend Developer; PHP​/AI

Senior Backend Developer (PHP / AI)Multis UK Limited is looking for an experienced Senior Backend Developer for the development and improvement of production systems, APIs and online marketplace platforms. AI-assisted development is part of our everyday workflow.Form of employment : part-time, full-time, contractLocation : RemotelyJob responsibilitiesDesign and development of backend applications and REST APIsDevelopment in PHP 8+ with SQL databasesArchitecture and improvement of existing production systemsSearch, automation and third-party service integrationsCode review, debugging and automated testingUse of AI coding tools and AI agents for development, research, testing and code reviewIntegration of AI APIs and agents into applications where appropriateTechnical guidance for junior developersRequirementsStrong commercial backend development experienceVery good PHP and SQL knowledgeExperience designing and maintaining REST APIsGit and modern development workflowsLinux and Docker experienceAbility to understand and improve existing codebasesAbility to work independently and make sound technical decisionsComfortable using modern AI coding tools and AI agents as part of developmentAdvantageMySQL and PostgreSQLElasticsearch and search technologiesMicrosoft Azure or other cloud platformsJavaScript or Type Script Automated functional and API testingMicroservices and asynchronous processingExperience integrating LLM/AI APIs, agents or AI-assisted content processingWe offerWork on real international production systems and online marketplacesModern development workflow including AI-assisted engineeringFlexible remote cooperationHigh level of technical independenceOpportunity to influence architecture and technical directionContact for this job position :Multis UK Limited