Senior Software Engineer Backend - CX

Description

Job Summary: As a Backend Software Engineer at Mercado Livre, you will design and scale innovative and secure systems that solve real-world, high-impact problems in a dynamic environment featuring cutting-edge technology and continuous learning. Key Highlights: 1. Design and scale innovative and secure systems in a dynamic environment. 2. Work with cutting-edge technology, AI, and continuous learning. 3. Lead challenging projects and be responsible for system improvements. As a **Backend 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 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 enhance agent reliability, accuracy, and security; * Proposing and implementing improvements to System Prompt, RAG, and MCPs to increase response efficiency and quality; * Conducting shadowing sessions with internal users to understand workflows, pain points, opportunities, and real usage requirements—and integrating and orchestrating MCPs across different business units; * Ensuring compliance with security, privacy, and regulatory best practices, and measuring and monitoring quality metrics; * Collaborating on architecture definitions and quality standards (testing, code reviews, system design, and performance). **What we’re looking for:** * Experience developing in Golang with strong engineering practices (e.g., SOLID, Clean Code). * Knowledge of service architecture and development: Clean Architecture, Design Patterns, Microservices, asynchronous systems, and messaging. * Knowledge of data persistence: relational databases, NoSQL, search engines, and caching mechanisms. * Experience with observability (logs, metrics, tracing), reliability, and incident analysis. Are you excited to leave your mark on Latin American technology? Apply now and join our purpose! Hybrid work model. Office located in Osasco, SP.