Senior Magento Developer (Magento 2 / Performance Focus) | RemoteQAT Global, a QAT Global US-based IT consulting firm with more than 30 years in the market, is hiring aSenior Magento Developerin Brazil to join an international project supporting a US client. This professional will work directly with client stakeholders in the US and collaborate with distributed teams across Brazil, Costa Rica, and the United States, contributing to performance improvements, technical analysis, and long-term platform stability in a complex Magento environment.Location:100% Remote (Brazil) Hiring Model:CLT onlyMain Challenges:Analyze and improve performance across the Magento platform, identifying backend, database, and front-end bottlenecks Review legacy customizations and refactor technical debt impacting platform efficiency Optimize JavaScript execution and storefront rendering performance Evaluate modules, extensions, and integrations according to Magento best practices Support code deployment and version control using GitHub and CI/CD workflows Investigate root causes of production issues and propose scalable technical solutions Contribute with architectural recommendations focused on scalability, maintainability, and securityRequired Experience:Strong professional experience with Magento development (Magento 2 strongly preferred) Strong expertise in Magento architecture, module development, and customizations Proven experience troubleshooting performance issues and legacy code problems Solid knowledge of JavaScript performance optimization in Magento storefronts Strong experience with PHP, HTML5, CSS, and codebase improvement Experience with repository management and deployment workflows using GitHub Ability to work directly with technical teams and client stakeholders in EnglishPreferred Background:Magento caching and database optimization CI/CD and DevOps practices Code audits and technical health assessments Large-scale e-commerce environmentsThis role is particularly relevant for professionals who have already worked with complex Magento environments, production troubleshooting, and technical modernization of existing platforms.