Job Summary: Design and scale innovative, secure systems in a dynamic environment, applying AI and continuous learning to democratize e-commerce. Key Highlights: 1. Work with cutting-edge technology and proprietary AI models. 2. Solve high-impact problems within an ecosystem processing 900M daily transactions. 3. Actively participate in defining the team's roadmap. As a **Software Engineer** at Mercado Livre, you will design and scale innovative, secure systems that solve real, high-impact problems. You will work in a dynamic environment leveraging cutting-edge technology, engineering best practices, proprietary AI models, and continuous learning—aiming to democratize e-commerce and financial services across Latin America. Imagine\-yourself leading challenging, dynamic, and innovative projects and being **responsible for:** * Developing and evolving various applications and components focused on security across the entire Meli ecosystem. * Tackling technically complex problems in critical services processing over 900 million transactions daily, with central impact across the company. * Ensuring quality and robustness of developed components, meeting requirements for observability, high availability, reliability, and performance. * Actively participating in organizing, defining, and prioritizing the team's backlog and roadmap. **What we’re looking for in you?** * Experience in Backend development using Go or Java, along with designing and implementing REST services. * Familiarity with cloud architectures and tools, and experience in high-load environments with a focus on concurrency. * Solid knowledge of testing strategies across multiple layers: unit, integration, functional, and load testing. **Are you excited to leave your mark on Latin America’s technology landscape?** Apply now and join our purpose! Hybrid work model. Locations: Osasco (SP)