This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Backend Software Engineer based in Brazil. This is a strategic technical leadership opportunity for an experienced backend engineer ready to operate beyond the scope of a single team. You will serve as a technical reference, shaping architecture and engineering standards across multiple teams and helping translate business priorities into sustainable technical decisions. The role focuses on highly available, distributed systems, scalability, resilience, observability, and engineering excellence. You will combine hands-on development of critical solutions with technical mentorship and architectural leadership. The position also offers the opportunity to influence how teams approach code quality, testing, CI/CD, security, performance, and incident management. It is an ideal environment for a Staff-level professional who enjoys solving complex problems, enabling other engineers, and driving meaningful technical evolution.