Job Summary: As a Senior Software Engineer at Mercado Livre, you will design and scale innovative and secure systems, collaborate on the design of high-impact products, and ensure code quality. Key Highlights: 1. Design and scale innovative and secure systems for high-impact problems. 2. Collaborate on architecture and scalability definitions for products. 3. Apply engineering best practices and cutting-edge technology in a dynamic environment. As a **Senior Software Engineer** at Mercado Livre, you will design and scale innovative and secure systems that solve real, high-impact problems. You will work in a dynamic environment with cutting-edge technology, applying engineering best practices, proprietary AI models, and continuous learning, with the purpose of democratizing e-commerce and financial services across Latin America. Imagine\-yourself leading challenging, dynamic, and innovative projects and being **responsible for:** * Participating in all phases of high-impact product design, analyzing requirements, proposing, and developing solutions that add value to both technical and business areas. * Possessing solid knowledge of data structures, design patterns, and modern architectural patterns. * Collaborating on architecture and scalability definitions for products, prioritizing performance optimization and maintainability. * Identifying and proposing the best development practices, participating in project definition, conducting code reviews and tests, implementing, and maintaining solutions. * Ensuring code quality and guaranteeing observability of business and system metrics. **What we are looking for in you?** * Solid experience developing web applications in Golang, applying SOLID principles and Clean Code, along with software engineering best practices. * Proficiency in developing cloud\-based applications such as AWS or GCP. * Knowledge of architecture, including Clean Architecture, Design Patterns, Microservices, asynchronous systems, and messaging. * Knowledge of data persistence models, using relational databases like MySQL and NoSQL databases such as MongoDB, ElasticSearch, Redis, or similar. * Familiarity with monitoring tools such as NewRelic, DataDog, Kibana, or similar. **Are you excited to leave your mark on Latin America's technology landscape?** Apply now and join our mission! Hybrid work model. Melicidade Office (São Paulo).