Job Summary: Design and scale innovative and secure systems in a dynamic environment, applying engineering best practices and continuous learning to democratize e-commerce. Key Highlights: 1. Participate in architecture definition and identify key issues 2. Apply best practices to ensure result quality 3. Experience in backend development in Java or Kotlin and databases As a **Software Engineer Backend** at Mercado Livre, you will design and scale innovative and secure systems that solve real-world, 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 across Latin America. Imagine\-yourself leading challenging, dynamic, and innovative projects **and being responsible for:** * Participating in architecture definition and identifying key issues—such as technical, process-related, or functional dependencies—with other initiative teams. * Helping define processes, methodologies, standards, and workflows that contribute to development excellence. * Applying best practices to ensure result quality and the health and security of initiative applications. * Participating in all phases (design, planning, and development) of high-impact products, analyzing requirements and proposing solutions that add value to both technical and business areas. * Frequently communicating with and supporting users to identify their needs and potential process improvements, and assisting with tool usage (JIRA). **What we’re looking for in you:** * Experience in backend development using Java or Kotlin, application architecture, and databases (relational or non-relational), such as MySQL and BigQuery; * Experience using and developing metrics with Datadog, microservices-based architectures, REST APIs, and asynchronous messaging. * Experience using tools including Git, Datadog, Kibana, New Relic, Opsgenie, and Jira. * Knowledge of experimentation and testing; object-oriented programming / SOLID principles / Design Patterns. **Are you excited to leave your mark on Latin American technology?** Apply now and join our purpose! Hybrid work model. Office located in Florianópolis \- SC.