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Job Summary: As a Backend Software Engineer at Mercado Livre, you will undertake challenging and dynamic projects, designing and scaling innovative and secure systems to democratize e-commerce and financial services across Latin America. Key Highlights: 1. Design and scale high-impact, innovative, and secure systems. 2. Work with cutting-edge technology, AI, and continuous learning. 3. Contribute to scalable and highly available architectures. As a **Backend Software Engineer** at Mercado Livre, imagine yourself undertaking challenging and dynamic projects. You will design and scale innovative and secure systems that solve real-world, high-impact problems. You will work in a dynamic environment leveraging cutting-edge technology, applying engineering best practices, AI models, and continuous learning — all aimed at democratizing e-commerce and financial services across Latin America. **Imagine yourself leading projects and being responsible for:** * Participating in all stages of high-impact product development — from requirements analysis to proposing solutions that deliver both technical and business value. * Supporting the establishment of agreements and alignment across diverse teams, enabling progress on use cases and improvement of our products’ KPIs. * Contributing to the definition of scalable and highly available architectures, building and executing tests, and monitoring technical and business performance metrics. * Working with high-volume transactional and data systems using relational and NoSQL databases, ensuring performance and scalability. * Taking ownership in interactions with business stakeholders and peer teams — clarifying questions and collaborating to resolve issues impacting our products and operations. **What we’re looking for:** * Solid backend development experience with Java or Kotlin, and experience with microservices. * Knowledge of messaging systems and topics (e.g., Kafka, RabbitMQ, or similar), including producers/consumers, partitioning, DLQ, and idempotency. * Proficiency in REST APIs: contract design, versioning, best practices, documentation (OpenAPI/Swagger), and testing. * Experience with relational databases (e.g., MySQL) and NoSQL databases. * Experience with SRE/observability tools: New Relic, Kibana, Datadog, and Elasticsearch. **Are you excited to leave your mark on Latin American technology?** Apply now and join our mission! Hybrid work model. Office locations: Osasco/SP or Florianópolis/SC.
