This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior Security Engineer, Detection & Response based in Brazil . As a Senior Security Engineer, Detection & Response, you will play a critical role in protecting cloud infrastructure, applications, and sensitive data by strengthening security monitoring and incident response capabilities. You will design, operate, and continuously improve detection systems, investigate suspicious activity, and lead security incidents from initial discovery through root-cause resolution. The role combines hands-on security engineering, vulnerability management, proactive threat hunting, and cloud-native security expertise. You will collaborate with infrastructure, platform, and engineering teams to improve security controls, strengthen auditability, and ensure effective remediation. You will also leverage AI-powered tools and automation to streamline investigations and scale security operations. This opportunity is ideal for an experienced, action-oriented security professional who enjoys solving complex technical challenges in a fast-paced, cloud-first environment.