This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior Platform Security Engineer – AI Resilience & Security Enhancements (Contract) based in Spain. In this hands-on contract role, you will strengthen the security and resilience of a modern engineering platform, with a particular focus on AI-enabled workflows and secure software delivery. You will work closely with platform, engineering, and security teams to design, prototype, and implement practical security controls. Your work will span secure autonomous agent execution, CI/CD security, production access management, container security, and software supply chain integrity. You will turn security requirements into reliable, maintainable tooling and workflows that developers can use in their day-to-day work. The role combines technical problem-solving, automation, and close collaboration with engineers to deliver measurable improvements to production systems. You will help improve security without compromising service availability or engineering productivity.