Senior/Staff Engineer, Application & Product Security

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior/Staff Engineer, Application & Product Security based in the United States. This role will help shape how security is built into products and engineering practices across a rapidly growing technology organization. You will make secure development the default by embedding security requirements, guardrails, threat modeling, and risk management throughout the software development lifecycle. The position combines hands-on application security engineering with close partnership across product, engineering, DevOps, and services teams. You will work directly with source code and complex microservice architectures to identify meaningful risks and design practical solutions. The role also offers the opportunity to influence the security of emerging AI and agent-based capabilities as they move rapidly into production. Success requires balancing strong security outcomes with an understanding of business priorities and developer experience. This is an execution-oriented environment for a security engineer who wants to build scalable security capabilities rather than simply identify vulnerabilities.