This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Sr. Security Engineer based in the United States. This role offers the opportunity to shape and strengthen security practices within a fast-growing technology environment.You will work closely with engineering teams to embed security throughout the software development lifecycle and protect critical systems and customer data.The position focuses on proactive application security, threat modeling, secure architecture, and AI-related security challenges.You will help build scalable security processes that enable teams to innovate quickly while maintaining strong protection standards.This role provides significant ownership, allowing you to influence security strategy, tooling, and engineering practices from the ground up.You will collaborate with internal teams and external security partners to elevate security maturity and reduce risk across the organization.