Job Summary: As a Frontend Software Engineer at Mercado Livre, you will design and scale innovative and secure systems in a dynamic environment powered by cutting-edge technology, democratizing e-commerce and financial services across Latin America. Key Highlights: 1. Lead challenging, dynamic, and innovative projects. 2. Work with cutting-edge technology and proprietary AI models. 3. Democratize e-commerce and financial services. As a **Frontend Software Engineer** 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 leveraging cutting-edge technology, engineering best practices, proprietary AI models, and continuous learning—all aimed at democratizing e-commerce and financial services across Latin America. Imagine\-yourself leading challenging, dynamic, and innovative projects and **being responsible for:** * Leading "Cross" initiatives to facilitate integration and collaboration with other teams across analysis, solution design, development, testing, and deployment. * Supporting the Product team in demand conception, feasibility studies, rollout strategies, and decision-making. * Acting consultatively with the UX team to help build the best possible user experience for our customers, and gathering requirements from Product/UX while documenting decisions. * Ensuring metrics are defined and used to propose product improvements and support application sustainability. * Mentoring and supporting less experienced team members to assist with tasks and foster their technical growth. **What we’re looking for in you?** * Solid experience with React v.17\+, Node.js, Express, and/or JavaScript/TypeScript. * Knowledge of Server\-Side Rendering (SSR) and client\-side performance optimization, plus expertise in CSS, HTML, and Accessibility best practices. * Experience with unit testing—especially Jest and React Testing Library—and familiarity with principles such as SOLID, Clean Code, DRY, and KISS. * Proficiency with version control tools (Git) and observability platforms (Datadog, Kibana, New Relic). * Knowledge of resilience patterns such as Fault Tolerance and Circuit Breaker. * Understanding of Design Patterns (Singleton, Factory, Observer, etc.) and interest or experience in Artificial Intelligence (Prompt Engineering, LLMs, RAG, MCP). **Are you excited to leave your mark on Latin America’s tech landscape?** Apply now and join our mission! Hybrid work model. Office location: Osasco, São Paulo.
João Silva
Indeed · HR
João Silva
Indeed · HR
