Software Engineer - Backend

Description

Job Summary: As a Software Engineer at Mercado Livre, you will design and scale innovative and secure systems, applying AI and continuous learning to democratize e-commerce and financial services across Latin America. Key Highlights: 1. Design and scale innovative and secure AI-powered systems 2. Work in a dynamic environment with cutting-edge technology 3. Collaborate on defining architecture and quality standards As a **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 with cutting-edge technology, applying 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:** * Evolving an agentic assistant powered by LLMs, ensuring robustness, observability, and scalability, while investigating and mitigating hallucinations to improve agent reliability, accuracy, and security. * Proposing and implementing improvements to System Prompt, RAG, and MCPs to enhance response efficiency and quality. * Conducting shadowing sessions with internal users to understand workflows, pain points, opportunities, and real usage requirements; integrating and orchestrating MCPs from different business units. * Ensuring compliance with security, privacy, and regulatory best practices; measuring and monitoring quality metrics. * Collaborating on defining architecture and quality standards (writing tests, reviewing code, designing system architecture, optimizing performance). **What we’re looking for:** * Experience developing in Golang and applying engineering best practices (e.g., SOLID, Clean Code). * Knowledge of service architecture and development, including Clean Architecture, Design Patterns, microservices, asynchronous systems, and messaging. * Solid expertise in data persistence, including relational databases, NoSQL, search engines, and caching mechanisms. * Experience with observability (logs, metrics, tracing), ensuring system reliability and performing incident analysis. **Are you excited to leave your mark on Latin America’s technology landscape?** Apply now and join our purpose! Hybrid work model. Melicidade Office (São Paulo).