As a **Senior** **Backend Software Engineer** at Mercado Livre, you will design and scale innovative, secure systems that solve real-world, high-impact problems. You will work in a dynamic environment leveraging cutting-edge technology, applying engineering best practices, proprietary AI models, and continuous learning—all aimed at democratizing e-commerce and financial services across Latin America. The Remunerated Account is a Mercado Pago product, available in multiple countries, enabling users to invest their account balance to generate returns while maintaining liquidity. Imagine yourself leading challenging, dynamic, and innovative projects and **being responsible for:** * Integrating GenAI and machine learning solutions into the Mercado Pago Remunerated Account ecosystem. * Building predictive and automation models to shield our services from potential failures, thereby ensuring integrity, resilience, and security for our users and processes. * Designing and maintaining scalable solutions in collaboration with other teams within Mercado Pago. * Working synergistically with IT, product, and business teams to deliver the best possible user experience alongside continuous product evolution. * Understanding requirements and proposing solutions aligned with the needs and complexities of each workflow—always considering business impact, user experience, and productivity. **What we’re looking for in you:** * Proficiency in backend programming languages such as Go. * Experience translating business requirements into scalable technical solutions. * Experience with monitoring and observability tools (e.g., Datadog, New Relic, Kibana). * Experience with relational and/or non-relational databases. * Knowledge of Model Context Protocol (MCP). * Familiarity with prompt engineering, plus interest in Generative AI and large language models (LLMs). **Are you excited to leave your mark on Latin America’s technology landscape?** Apply now and join our mission! Hybrid work mode in Florianópolis, Santa Catarina.