As a **Backend Software Engineer** at Mercado Livre, 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:** * Implementing, testing, and maintaining APIs and services in Java and Go, with a primary focus on scalability, resilience, performance, and observability. * Supporting cross-functional demands by facilitating integration and collaboration with various teams in analysis, solution design, development, testing, deployment, monitoring, and post-deployment follow-up. * Ensuring the creation of metrics and dashboards and using them to propose product improvements and proactively detect potential failures. * Mentoring and supporting less experienced team members to assist with tasks and technical growth. * Assisting in defining and driving technical initiatives to ensure the project's technological advancement. **What are we looking for in you?** * Solid experience in backend development, with proficiency in Java or Go. * Experience in developing distributed systems, REST APIs, scalable solutions, and working in cloud environments. * Strong knowledge of application architecture, design patterns, and development principles: CLEAN, SOLID, KISS, DRY, code refactoring, legacy handling, threading, networking, and dependency injection. * Knowledge and experience using software design patterns. Familiarity and hands-on experience with monitoring and diagnostic tools such as Datadog or New Relic. **Are you excited to leave your mark on Latin America’s technology landscape?** Apply now and join our mission! Hybrid work model. Osasco, SP.