As a **Senior Software Engineer Backend** 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 and **being responsible for:** * Participating in the technical design of the Software Architecture for the future of our users' investments. * Ensuring proper operation, enabling our users to successfully make their investments. * Acting as a technical liaison between our providers and Mercado Pago. * Understanding current solutions and applying best practices in software architecture, design patterns, and microservices to ensure our platform operates with maximum efficiency. * Working on a product in constant evolution and high visibility. **What we are looking for in you?** * Solid knowledge of Python and Django, although not mandatory. Knowledge of Golang, Java, or .NET is also acceptable. * Knowledge and experience in developing distributed systems and REST APIs. * Experience with automated testing (unit and integration), observability, and monitoring. * Experience creating and consuming message queues. * Experience working with AWS. **Are you excited to leave your mark on technology in Latin America?** Apply now and join our mission! Hybrid work mode in Osasco, São Paulo.