This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior Backend Software Engineer | MEP based in Brazil. Join a mission-driven technology team building innovative solutions that make workplace wellbeing more accessible worldwide. In this senior backend engineering role, you will design, develop, and maintain scalable services that power the small and medium-sized business (SMB) customer acquisition journey. You will work with modern technologies, including Kotlin, Go, Kafka, and cloud-native infrastructure, to build resilient, high-performance distributed systems. Collaborating closely with Product, Marketing, Sales, and engineering teams, you will transform business requirements into reliable technical solutions. Your work will help optimize customer conversion, strengthen integrations, and improve the overall acquisition experience. You will contribute to architectural decisions, engineering best practices, and continuous improvements across a distributed, collaborative environment. This is an opportunity to take ownership of critical backend services while supporting a global mission focused on health and wellbeing.