Senior Security Engineer, Offensive Security & Remediation

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, Offensive Security & Remediation based in the United States . The Senior Security Engineer will play a key role in strengthening application, infrastructure, and product security through continuous offensive testing and hands-on remediation. This position is heavily focused on identifying vulnerabilities across TypeScript applications, APIs, and AWS environments, while translating findings into practical, lasting security improvements. You will lead penetration testing and red team activities, simulate realistic attack scenarios, and assess emerging risks associated with AI-powered applications and tools. Alongside offensive work, you will contribute directly to secure engineering by developing fixes, automated safeguards, and reusable security patterns. Working within a small, engineering-focused security team, you will collaborate closely with product and platform engineers to reduce exposure, improve security tooling, and build more resilient systems.