This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior / Staff Security Engineer based in United States . The Senior / Staff Security Engineer will play a key role in strengthening product and infrastructure security for a rapidly evolving software platform serving teams worldwide. In this hands-on position, you will help shape and scale security practices as the product expands its capabilities and enterprise presence. You will own critical security initiatives spanning vulnerability management, application security, incident response, and cloud infrastructure protection. Working closely with engineering and trust teams, you will integrate security into product development, improve detection and remediation processes, and build automation that scales with the business. This remote-first opportunity offers significant autonomy, technical ownership, and the chance to influence security strategy while working with modern cloud technologies and AI-assisted engineering tools.