As an **Integration Engineer** at Mercado Libre, you will design and scale innovative and secure systems that solve real, high-impact problems. You will work in a dynamic environment with cutting-edge technology, applying engineering best practices, proprietary AI models, and continuous learning, with the purpose of democratizing e-commerce and financial services in Latin America. **Imagine yourself leading challenging, dynamic, and innovative projects, being responsible for:** * Leading the technical side of opportunities, collaborating with the commercial team to define architecture, integration scope, and functional and non-functional requirements for Mercado Pago's payment solutions. * Designing and guiding implementations using REST APIs, SDKs, webhooks, and other technical interfaces, ensuring alignment with Mercado Pago's architecture and scalability in integrated products. * Conducting in-depth technical analyses, including log reading, advanced troubleshooting, flow validation, and integration failure diagnostics, ensuring reliability and resilience. * Supporting clients and partners with architectural decisions, translating business needs into technical solutions, and recommending best practices in development, security, and performance. * Acting as a bridge between clients, commercial teams, and internal engineering, ensuring technical alignment, anticipating risks, and contributing to the design of robust solutions from pre-sales to go-live. . **What we’re looking for in you?** * Familiarity with artificial intelligence concepts and tools, including LLMs and the MCP protocol, as well as facilitating automations in day-to-day activities. * Proficiency with REST APIs and tools such as Postman and Swagger to make requests and validate responses. * Ability to write and debug basic code in languages such as Java, JavaScript, SQL, and HTML. * Knowledge of SQL for querying and analyzing databases, aiming for performance improvements. **Are you excited about making your mark on Latin America’s technology landscape?** Apply now and join our mission! Hybrid work model. Melicidade Office – Osasco, São Paulo.